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All questions of Human Reproduction for NEET Exam
Interstitial cells or leydig cells are present between______.- a)Basal lamina
- b)Seminiferous tubules
- c)Tubuli recti
- d)Sertoli cells
Correct answer is option 'B'. Can you explain this answer?
Interstitial cells or leydig cells are present between______.
a)
Basal lamina
b)
Seminiferous tubules
c)
Tubuli recti
d)
Sertoli cells
|
Sathvika Tadri answered |
Interstitial cells or leydig cells are present between seminiferous tubules..they secrete androgens..mainly testosterone
Can you explain the answer of this question below:The yellowish coloured milk secreted from the breast shortly after birth of the baby is called?
- A:
Lactogen
- B:
Primary milk
- C:
Colostrum
- D:
None of these
The answer is c.
The yellowish coloured milk secreted from the breast shortly after birth of the baby is called?
Lactogen
Primary milk
Colostrum
None of these
|
Rohit Shah answered |
Colostrum is a thick and sticky, yellow to orange colored milk that is created by your breasts to give your baby the nutrition he needs immediately after birth. It is low in fat, high in carbohydrates and has a laxative effect on the baby which helps him pass the first meconium stools that are sitting in his intestines. This also helps get rid of the bile and helps lessen the chance of jaundice in your newborn.
Ovulation occurs on the ------ day of menstrual cycle. - a)08-10
- b)12-14
- c)14-16
- d)16-18
Correct answer is option 'C'. Can you explain this answer?
Ovulation occurs on the ------ day of menstrual cycle.
a)
08-10
b)
12-14
c)
14-16
d)
16-18
|
Maya Sengupta answered |
The release of ovum from ovary during menstrual cycle is is called ovulation. Ovulation occurs in the middle of menstrual cycle that is on 14-16th day of start of menstrual cycle.
Shortest phase of the menstrual cycle is______.- a)Ovulatory phase
- b)Menses
- c)Follicular phase
- d)Luteal phase
Correct answer is option 'A'. Can you explain this answer?
Shortest phase of the menstrual cycle is______.
a)
Ovulatory phase
b)
Menses
c)
Follicular phase
d)
Luteal phase
|
Priya Menon answered |
Menstrual cycle is divided into several phase starting from menses during which endometrium breaks and comes out through vagina for 4 to 5 days. Ovulatory phase occurs in the middle of menstrual cycle (14/15th day) during which egg is released.
The main function of mammalian corpus luteum is to produce: [2014]a)estrogen onlyb)progesteronec)human chorionic gonadotropind)relaxin only Correct answer is option 'B'. Can you explain this answer?
|
Jasmin answered |
I'm also thinking that it is progesterone
Spermatogenesis is induced by- a)FSH
- b)ICSH
- c)STH
- d)ATH
Correct answer is option 'A'. Can you explain this answer?
Spermatogenesis is induced by
a)
FSH
b)
ICSH
c)
STH
d)
ATH
|
Geetika Shah answered |
FSH acts on the Sertoli cells and stimulate secretion of some factors which help in the process of spermatogenesis.
Fertilization in humans is practically feasible only if [2016]- a)the sperms are transported into vagina just after the release of ovum in fallopian tube
- b)the ovum and sperms are transported simultaneously to ampullary isthmic junction of the fallopian tube
- c)the ovum and sperms are transported simultaneously to ampullary - isthmic junction of the cervix
- d)the sperms are transported into cervix within 48 hrs of release of ovum in uterus
Correct answer is option 'B'. Can you explain this answer?
Fertilization in humans is practically feasible only if [2016]
a)
the sperms are transported into vagina just after the release of ovum in fallopian tube
b)
the ovum and sperms are transported simultaneously to ampullary isthmic junction of the fallopian tube
c)
the ovum and sperms are transported simultaneously to ampullary - isthmic junction of the cervix
d)
the sperms are transported into cervix within 48 hrs of release of ovum in uterus
|
Yash Saha answered |
(b) The word ampulla is derived from the Latin word 'flask'. Being the second portion of the fallopian tube, it is the intermediate dilated portion which immediately curves over the ovary. This is the common site of human fertilization as both the ovum and sperms are simultaneously transported here
The shared terminal duct of the reproductive and urinary system in the human male is: [2014]- a)Urethra
- b)Ureter
- c)Vas deferens
- d)Vasa efferentia
Correct answer is option 'A'. Can you explain this answer?
The shared terminal duct of the reproductive and urinary system in the human male is: [2014]
a)
Urethra
b)
Ureter
c)
Vas deferens
d)
Vasa efferentia
|
Arya Khanna answered |
(a) Urethra is a tube that connects the urinary bladder to the genitals for the removal of fluids from the body. The urethra travels through the penis, and carries semen as well as urine.
Which one is the most likely reason of not occurring regular menstrual cycle?- a)Fertilization of ovum
- b)Retention of corpus luteum
- c)Maintenance of hypertropical endometrial lining
- d)Maintenance of high concentration of sex hormones
Correct answer is option 'A'. Can you explain this answer?
Which one is the most likely reason of not occurring regular menstrual cycle?
a)
Fertilization of ovum
b)
Retention of corpus luteum
c)
Maintenance of hypertropical endometrial lining
d)
Maintenance of high concentration of sex hormones
|
Sushant Goyal answered |
Menstrual cycles get stopped during pregnancy. Sometimes it becomes irregular due to stress and other hormonal activities of the body.
The cellular layer that disintegrates and regenerates again and again is _______.
- a)Dermis of skin
- b)Endometrium of uterus
- c)Cornea of eye
- d)Endometrium of blood vessels
Correct answer is option 'B'. Can you explain this answer?
The cellular layer that disintegrates and regenerates again and again is _______.
a)
Dermis of skin
b)
Endometrium of uterus
c)
Cornea of eye
d)
Endometrium of blood vessels
|
Rhea Sarkar answered |
- The functional layer of the human endometrium is a highly regenerative tissue undergoing monthly cycles of growth, differentiation, and shedding during a woman's reproductive years.
- Fluctuating levels of circulating estrogen and progesterone orchestrate this dramatic remodelling of human endometrium.
Hence, the correct option is B.
NCERT Reference: topic “MENSTRUAL CYCLE” of chapter: Human Reproduction.
NCERT Reference: topic “MENSTRUAL CYCLE” of chapter: Human Reproduction.
Select the correct option describing gonadotropin activity in a normal pregnant female: [2014]
- a)High level of FSH and LH stimulates the thickening of endometrium.
- b)High level of FSH and LH facilitate implantation of the embryo.
- c)High level of hCG stimulates the synthesis of estrogen and progesterone.
- d)High level of hCG stimulates the thickening of endometrium.
Correct answer is option 'C'. Can you explain this answer?
Select the correct option describing gonadotropin activity in a normal pregnant female: [2014]
a)
High level of FSH and LH stimulates the thickening of endometrium.
b)
High level of FSH and LH facilitate implantation of the embryo.
c)
High level of hCG stimulates the synthesis of estrogen and progesterone.
d)
High level of hCG stimulates the thickening of endometrium.
|
Nilanjan Chakraborty answered |
(c) Synthesis of estrogen and progesterone due to high level of hCG is a normal gonadotropic activity in a normal pregnant female.
Hormone responsible for milk ejection after the birth of baby is:
- a)Progesterone
- b)vasopressin
- c)Estrogens
- d)Oxytocin
Correct answer is option 'D'. Can you explain this answer?
Hormone responsible for milk ejection after the birth of baby is:
a)
Progesterone
b)
vasopressin
c)
Estrogens
d)
Oxytocin
|
Naina Choudhary answered |
Hormone responsible for milk ejection after the birth of baby is oxytocin.
Explanation:
After the birth of a baby, the mother's body undergoes various hormonal changes that promote milk production and ejection. The primary hormone responsible for milk ejection is oxytocin, which is produced in the hypothalamus and released from the posterior pituitary gland.
When a baby suckles at the breast, nerve endings in the nipple and areola are stimulated, which triggers the release of oxytocin. Oxytocin then causes the smooth muscle cells in the milk ducts to contract, which pushes the milk out of the breast and into the baby's mouth. This process is known as the milk ejection reflex or let-down reflex.
Other hormones that are involved in milk production and ejection include:
- Prolactin: This hormone is produced in the anterior pituitary gland and stimulates milk production in the mammary glands.
- Estrogens: These hormones are produced in the ovaries and play a role in breast development and milk production.
- Progesterone: This hormone is produced in the ovaries and plays a role in preparing the breast for milk production.
However, in terms of milk ejection specifically, oxytocin is the primary hormone involved.
Explanation:
After the birth of a baby, the mother's body undergoes various hormonal changes that promote milk production and ejection. The primary hormone responsible for milk ejection is oxytocin, which is produced in the hypothalamus and released from the posterior pituitary gland.
When a baby suckles at the breast, nerve endings in the nipple and areola are stimulated, which triggers the release of oxytocin. Oxytocin then causes the smooth muscle cells in the milk ducts to contract, which pushes the milk out of the breast and into the baby's mouth. This process is known as the milk ejection reflex or let-down reflex.
Other hormones that are involved in milk production and ejection include:
- Prolactin: This hormone is produced in the anterior pituitary gland and stimulates milk production in the mammary glands.
- Estrogens: These hormones are produced in the ovaries and play a role in breast development and milk production.
- Progesterone: This hormone is produced in the ovaries and plays a role in preparing the breast for milk production.
However, in terms of milk ejection specifically, oxytocin is the primary hormone involved.
Which of the following cells during gametogenesis is normally dipoid? [2015 RS]- a)Spermatid
- b)Spermatogonia
- c)Secondary polar body
- d)Primary polar body
Correct answer is option 'B'. Can you explain this answer?
Which of the following cells during gametogenesis is normally dipoid? [2015 RS]
a)
Spermatid
b)
Spermatogonia
c)
Secondary polar body
d)
Primary polar body
|
Dipanjan Mehta answered |
(b) During gametogenesis, spermatogonia are diploid because of undergoing the process of meiosis.
Select the incorrect statement : [2016]- a)FSH stimulates the sertoli cells which help in spermiogenesis
- b)LH triggers ovulation in ovary
- c)LH and FSH decrease gradually during the follicular phase
- d)LH triggers secretion of androgens from the Leydig cells
Correct answer is option 'C'. Can you explain this answer?
Select the incorrect statement : [2016]
a)
FSH stimulates the sertoli cells which help in spermiogenesis
b)
LH triggers ovulation in ovary
c)
LH and FSH decrease gradually during the follicular phase
d)
LH triggers secretion of androgens from the Leydig cells
|
Aman Sharma answered |
(c) Considering the female reproductive endocrinology, ovulation is the process of the monthly release of the viable oocyte from the ovary between the time of menarche and menopause. During this time, there is a surge in the production of LH and FSH, termed as gonadotropins, thereby initiating estradiol and progesterone secretion from the ovary. Both these hormones are very important for the menstrual cycle.
Which one of the following statements is incorrect about menstruation?[2008]- a)During normal menstruation about 40 ml blood is lost
- b)The menstrual fluid can easily clot
- c)At menopause in the female, there is especially abrupt increase in gonadotropic hormones
- d)The beginning of the cycle of menstruation is called menarche
Correct answer is option 'B'. Can you explain this answer?
Which one of the following statements is incorrect about menstruation?
[2008]
a)
During normal menstruation about 40 ml blood is lost
b)
The menstrual fluid can easily clot
c)
At menopause in the female, there is especially abrupt increase in gonadotropic hormones
d)
The beginning of the cycle of menstruation is called menarche
|
|
Shanaya Rane answered |
In human female, the periodic discharge of blood, mucus and cellular debris from uterine wall from non-pregnant women of sexual maturity is known as menstrual cycle. Few hours before the start of mensuration, the spiral arterioles constrict one by one resulting into the blanch mucosa. The mucosa shrinks and the death of the blood deprived tissues takes place.
The number of polar bodies formed during oogenesis in human being is:
- a)2
- b)3
- c)1
- d)Both 2 and 3.
Correct answer is option 'D'. Can you explain this answer?
The number of polar bodies formed during oogenesis in human being is:
a)
2
b)
3
c)
1
d)
Both 2 and 3.
|
Raj Yadav answered |
Polar bodies formed during oogenesis in humans
- During human oogenesis, three polar bodies are created.
- Polar bodies are tiny cytoplasmic exclusion structures that form to contain extra DNA produced during oocyte meiosis, which occurs after sperm fertilization.
- The zygote contains roughly 2-3 polar bodies, which are derived from the oocyte.
- This figure is determined by whether or not the first polar body (produced during meiosis I) splits during meiosis II.
- Excess DNA generated from reductive division makes up such an exclusion body (2nd and 3rd polar bodies are formed from meiosis II at the time of fertilization).
- Such polar bodies do not contribute to the zygote's, foetus', or embryo's future genetic complement.
Which part of ovary in mammals acts as an endocrine gland after ovulation?- a)Vitelline membrane
- b)Graffian follicle
- c)Stroma
- d)Corpus luteum
Correct answer is option 'D'. Can you explain this answer?
Which part of ovary in mammals acts as an endocrine gland after ovulation?
a)
Vitelline membrane
b)
Graffian follicle
c)
Stroma
d)
Corpus luteum
|
|
Unique answered |
Release of ovum from the ovary is called ovulation. The Graafian follicle rises to the surface; sends out a protuberance or stigma and everts to release the ovum Into peritoneal cavity. The empty Graafian follicle contains a blood clot which is called corpus haemorrhagic Its granulosa cells continue to proliferate, develop yellow carotene pigment or lutein and get converted into lutein cells. This converts the ruptured follicle into yellow body called corpus luteum. It becomes a temporary endocrine gland secreting progesterone with small quantity of estrogen.
Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion (A) : Urethra in human male act as a urogenital canal.
Reason (R) : Urethra carries only urine while sperms are carried by vasa deferentia only.
- a)Assertion (A) is false but reason (R) is true.
- b)Assertion (A) is true but reason (R) is false.
- c)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
- d)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
Correct answer is option 'B'. Can you explain this answer?
Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion (A) : Urethra in human male act as a urogenital canal.
Reason (R) : Urethra carries only urine while sperms are carried by vasa deferentia only.
a)
Assertion (A) is false but reason (R) is true.
b)
Assertion (A) is true but reason (R) is false.
c)
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
d)
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
|
|
Suresh Iyer answered |
Urethra is the canal through which both urine and semen is discharged therefore it is called urinogenital canal.
Which of the following hormone is produced in female only during pregnancy?
- a)Testosterone
- b)Human chorionic gonadotropin hormone (hCG).
- c)Progesterone
- d)Estrogen
Correct answer is option 'B'. Can you explain this answer?
Which of the following hormone is produced in female only during pregnancy?
a)
Testosterone
b)
Human chorionic gonadotropin hormone (hCG).
c)
Progesterone
d)
Estrogen
|
Dev Patel answered |
- It is made almost exclusively in the placenta.
- hCG hormone levels found in the mother's blood and urine, rise a lot during the first trimester.
- hCG Maintains the corpus luteum throughout the early stages of pregnancy. It is used to detect pregnancy.
Hence, the correct option is B.
NCERT Reference: Page no. 53 of topic “3.6 PREGNANCY AND EMBRYONIC DEVELOPMENT” of chapter 3.
In humans, at the end of the first meiotic division, the male germ cells differentiate into the[2008]- a)primary spermatocytes
- b)secondary spermatocytes
- c)spermatids
- d)spermatozonia
Correct answer is option 'B'. Can you explain this answer?
In humans, at the end of the first meiotic division, the male germ cells differentiate into the
[2008]
a)
primary spermatocytes
b)
secondary spermatocytes
c)
spermatids
d)
spermatozonia
|
Sonal Kulkarni answered |
In human, at the end of the first meiotic division, the male germ cells differentrate into the secondary.
Seminal plasma, the fluid part of semen is contributed by:
(i) Seminal vesicle
(ii) Prostate
(iii) Urethra
(iv) Bulbourethral gland- a)(ii), (iii) and (iv)
- b)(i) and (ii)
- c)(i), (ii) and (iv)
- d)(i) and (iv)
Correct answer is option 'C'. Can you explain this answer?
Seminal plasma, the fluid part of semen is contributed by:
(i) Seminal vesicle
(ii) Prostate
(iii) Urethra
(iv) Bulbourethral gland
(i) Seminal vesicle
(ii) Prostate
(iii) Urethra
(iv) Bulbourethral gland
a)
(ii), (iii) and (iv)
b)
(i) and (ii)
c)
(i), (ii) and (iv)
d)
(i) and (iv)
|
Kiran Singh answered |
Contributors to Seminal Plasma
Seminal plasma is the fluid part of semen that carries sperm. It is composed of a mixture of secretions from various male reproductive organs. The following are the contributors of seminal plasma:
(i) Seminal Vesicle - The seminal vesicle is a pair of glands that secrete a fluid that makes up 60-70% of the volume of semen. The fluid contains fructose, prostaglandins, and other substances that provide energy to the sperm and help them survive in the female reproductive tract.
(ii) Prostate - The prostate gland is a single gland located below the bladder that produces a milky fluid that makes up about 15-30% of the volume of semen. The fluid contains enzymes, citric acid, and prostate-specific antigen (PSA), which helps to liquefy semen after ejaculation.
(iii) Urethra - The urethra is a tube that runs through the penis and carries semen and urine out of the body. It contributes a small amount of fluid to the seminal plasma.
(iv) Bulbourethral Gland - The bulbourethral gland, also known as Cowper's gland, is a pair of small glands located at the base of the penis. They secrete a clear fluid that helps to lubricate the urethra and neutralize any acidic urine remaining in the urethra.
Conclusion
In conclusion, seminal plasma is a mixture of secretions from different male reproductive organs, including the seminal vesicle, prostate, urethra, and bulbourethral gland. The various secretions work together to provide energy to the sperm, help them survive in the female reproductive tract, and ensure that the semen can be ejaculated and transported effectively.
Seminal plasma is the fluid part of semen that carries sperm. It is composed of a mixture of secretions from various male reproductive organs. The following are the contributors of seminal plasma:
(i) Seminal Vesicle - The seminal vesicle is a pair of glands that secrete a fluid that makes up 60-70% of the volume of semen. The fluid contains fructose, prostaglandins, and other substances that provide energy to the sperm and help them survive in the female reproductive tract.
(ii) Prostate - The prostate gland is a single gland located below the bladder that produces a milky fluid that makes up about 15-30% of the volume of semen. The fluid contains enzymes, citric acid, and prostate-specific antigen (PSA), which helps to liquefy semen after ejaculation.
(iii) Urethra - The urethra is a tube that runs through the penis and carries semen and urine out of the body. It contributes a small amount of fluid to the seminal plasma.
(iv) Bulbourethral Gland - The bulbourethral gland, also known as Cowper's gland, is a pair of small glands located at the base of the penis. They secrete a clear fluid that helps to lubricate the urethra and neutralize any acidic urine remaining in the urethra.
Conclusion
In conclusion, seminal plasma is a mixture of secretions from different male reproductive organs, including the seminal vesicle, prostate, urethra, and bulbourethral gland. The various secretions work together to provide energy to the sperm, help them survive in the female reproductive tract, and ensure that the semen can be ejaculated and transported effectively.
Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female? [2009]
- a)Maintenance of the hypertrophical endometrial lining
- b)Fertilisation of the ovum
- c)Retention of well -developed corpus luteum
- d)Maintenance of high concentration of sex hormones in the blood stream
Correct answer is option 'D'. Can you explain this answer?
Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female? [2009]
a)
Maintenance of the hypertrophical endometrial lining
b)
Fertilisation of the ovum
c)
Retention of well -developed corpus luteum
d)
Maintenance of high concentration of sex hormones in the blood stream
|
Pallabi Reddy answered |
Fertilization of ovum is the most likely root cause why menstruation is not taking place in regularly cycling human female. In order for fertilization to occur, one of these sperm must attach itself to the ovum and penetrate its outer surface. The fertilized ovum will then continue travelling down the fallopian tube, taking several days until it reaches the uterus. When it arrives, it attaches itself to the lining of the uterus and continues to grow. If the ovum is not fertilized it will die and the progesterone and oestrogen hormone levels will drop. Without these hormones the prepared uterus lining breaks up and is released through the vagina. This is known as a ‘period’.
Seminal plasma in humans is rich in
[2009]
- a)glucose and certain enzymes but has no calcium
- b)fructose and calcium but has no enzymes
- c)fructose, calcium and certain enzymes
- d)fructose and certain enzymes but poor in calcium
Correct answer is option 'C'. Can you explain this answer?
Seminal plasma in humans is rich in
[2009]
a)
glucose and certain enzymes but has no calcium
b)
fructose and calcium but has no enzymes
c)
fructose, calcium and certain enzymes
d)
fructose and certain enzymes but poor in calcium
|
Aashna Mukherjee answered |
Human seminal plasma is a complex mixture of proteins, glycoproteins, pe ptides, glycope ptides, and prostaglandins secreted by organs of the male reproductive tract. The components of this fluid have been implicated in the suppression of immune response, agonistic effects on sperm-egg binding, and promotion of successful implantation of the human embryo. Seminal plasma in humans is rich in fructose and certain enzymes but poor in calcium.
A Human female reaches menopause around the age of_____.- a)25 years
- b)70 years
- c)50 years
- d)15 years
Correct answer is option 'C'. Can you explain this answer?
A Human female reaches menopause around the age of_____.
a)
25 years
b)
70 years
c)
50 years
d)
15 years
|
|
Keshav Chaudhary answered |
Women past a certain age will experience menopause. Menopause is defined as having no menstrual period for one year. The age you experience it can vary, but it typically occurs in your late 40s or early 50s.
Menopause can cause many changes in your body. The symptoms are the result of a decreased production of estrogen and progesterone in your ovaries. Symptoms may include hot flashes, weight gain, or vaginal dryness. Vaginal atrophy contributes to vagina dryness. With this, there can be inflammation and thinning of the vaginal tissues which adds to uncomfortable intercourse.
Menopause can also increase your risk for certain conditions like osteoporosis. You may find that getting through menopause requires little medical attention. Or you may decide you need to discuss symptoms and treatment options with a doctor.
Keep reading to learn about the 11 things every woman should know about menopause
Menopause can cause many changes in your body. The symptoms are the result of a decreased production of estrogen and progesterone in your ovaries. Symptoms may include hot flashes, weight gain, or vaginal dryness. Vaginal atrophy contributes to vagina dryness. With this, there can be inflammation and thinning of the vaginal tissues which adds to uncomfortable intercourse.
Menopause can also increase your risk for certain conditions like osteoporosis. You may find that getting through menopause requires little medical attention. Or you may decide you need to discuss symptoms and treatment options with a doctor.
Keep reading to learn about the 11 things every woman should know about menopause
During which month of pregnancy first movement of fetus is observed?- a)Sixth month
- b)Fourth month
- c)Fifth month
- d)Third month
Correct answer is option 'C'. Can you explain this answer?
During which month of pregnancy first movement of fetus is observed?
a)
Sixth month
b)
Fourth month
c)
Fifth month
d)
Third month
|
Saranya Joshi answered |
The correct answer is option C, i.e., fifth month.
Explanation:
The first movement of the fetus is called quickening. It is the first noticeable movement of the fetus by the mother. Quickening is the first sign that the pregnancy is progressing as expected. It usually occurs between the 16th and 25th weeks of pregnancy. However, it is most commonly felt around the 20th week of pregnancy, which is the fifth month.
During the first trimester, the fetus is too small and underdeveloped to produce movements that can be felt by the mother. The fetal movements at this stage are mostly uncoordinated and involuntary.
During the second trimester, the fetus grows and becomes more active. The movements become more coordinated and frequent. By the end of the fifth month, the fetus is about 10 inches long and weighs around 1 pound. The movements of the fetus become more pronounced and can be felt by the mother.
In summary, the first movement of the fetus can be observed in the fifth month of pregnancy, which is around the 20th week.
Explanation:
The first movement of the fetus is called quickening. It is the first noticeable movement of the fetus by the mother. Quickening is the first sign that the pregnancy is progressing as expected. It usually occurs between the 16th and 25th weeks of pregnancy. However, it is most commonly felt around the 20th week of pregnancy, which is the fifth month.
During the first trimester, the fetus is too small and underdeveloped to produce movements that can be felt by the mother. The fetal movements at this stage are mostly uncoordinated and involuntary.
During the second trimester, the fetus grows and becomes more active. The movements become more coordinated and frequent. By the end of the fifth month, the fetus is about 10 inches long and weighs around 1 pound. The movements of the fetus become more pronounced and can be felt by the mother.
In summary, the first movement of the fetus can be observed in the fifth month of pregnancy, which is around the 20th week.
Which of the following control the function of Sertoli cell?- a)FSH
- b)Estrogens
- c)Testosterone
- d)ACTH
Correct answer is option 'A'. Can you explain this answer?
Which of the following control the function of Sertoli cell?
a)
FSH
b)
Estrogens
c)
Testosterone
d)
ACTH
|
|
Gaurav Kumar answered |
FSH (follicle stimulating hormone) stimulates Sertoli cells to secrete spermatogenic substance. Sertoli cells function as nurse cells for differentiating spermatozoa.
Beginning of menstrual cycle is called as ___.- a)Ovulation
- b)Oogenesis
- c)Menarche
- d)Menopause
Correct answer is option 'C'. Can you explain this answer?
Beginning of menstrual cycle is called as ___.
a)
Ovulation
b)
Oogenesis
c)
Menarche
d)
Menopause
|
Gaurav Basu answered |
Menarche
Menarche is the beginning of the menstrual cycle, which is the process of shedding the uterine lining that occurs in women of reproductive age. It is a significant event in a girl's life as it indicates the onset of puberty and the ability to conceive a child.
Puberty
Puberty is the stage of development when a child's body becomes capable of reproduction. It is a gradual process that occurs over several years and involves physical changes such as the growth of breasts and pubic hair, as well as psychological changes such as the onset of sexual attraction and the development of a sense of identity.
Age of Menarche
The age of menarche varies widely among girls, but it typically occurs between the ages of 11 and 14. Factors that can influence the age of menarche include genetics, nutrition, and overall health.
Signs of Menarche
The signs of menarche include the onset of vaginal bleeding, which may be light or heavy, and may last for several days. Other signs may include abdominal cramping, mood swings, and breast tenderness.
Importance of Menstrual Cycle
The menstrual cycle is an important process that allows women to conceive and bear children. It also plays a role in maintaining overall health by regulating hormone levels and removing waste products from the body.
Conclusion
In conclusion, menarche is the beginning of the menstrual cycle and marks the onset of puberty in girls. It is a significant event that has both physical and psychological implications and is an important part of a woman's reproductive health.
Menarche is the beginning of the menstrual cycle, which is the process of shedding the uterine lining that occurs in women of reproductive age. It is a significant event in a girl's life as it indicates the onset of puberty and the ability to conceive a child.
Puberty
Puberty is the stage of development when a child's body becomes capable of reproduction. It is a gradual process that occurs over several years and involves physical changes such as the growth of breasts and pubic hair, as well as psychological changes such as the onset of sexual attraction and the development of a sense of identity.
Age of Menarche
The age of menarche varies widely among girls, but it typically occurs between the ages of 11 and 14. Factors that can influence the age of menarche include genetics, nutrition, and overall health.
Signs of Menarche
The signs of menarche include the onset of vaginal bleeding, which may be light or heavy, and may last for several days. Other signs may include abdominal cramping, mood swings, and breast tenderness.
Importance of Menstrual Cycle
The menstrual cycle is an important process that allows women to conceive and bear children. It also plays a role in maintaining overall health by regulating hormone levels and removing waste products from the body.
Conclusion
In conclusion, menarche is the beginning of the menstrual cycle and marks the onset of puberty in girls. It is a significant event that has both physical and psychological implications and is an important part of a woman's reproductive health.
Can you explain the answer of this question below:Each testis has about 250 compartment called as____.
- A:
Oogonia
- B:
Seminiferous tubules
- C:
Lactiferous lobules
- D:
Testicular lobules
The answer is d.
Each testis has about 250 compartment called as____.
Oogonia
Seminiferous tubules
Lactiferous lobules
Testicular lobules
|
Pooja Pillai answered |
Each testis contains about 250 compartments called testicular lobules. Each testicular lobule contains one to three highly coiled seminiferous tubules that produce sperms.
Maturation of human sperms occur in:
- a)Ampulla of vas
- b)Epididymis
- c)Urethra
- d)In the female genital tract after Ejaculation
Correct answer is option 'B'. Can you explain this answer?
Maturation of human sperms occur in:
a)
Ampulla of vas
b)
Epididymis
c)
Urethra
d)
In the female genital tract after Ejaculation
|
|
Hitakshi Tamta G answered |
After spermatogenesis, immature sperms are pushed out of the seminiferous tubules by other sperms and the fluids produced by the Sertoli cells.
As sperm enter the epididymis, they complete maturation. The optimal environment for sperm maturation is determined by the secretory activity of epididymal epithelial cells. Thus, the correct answer is option 'B'.
As sperm enter the epididymis, they complete maturation. The optimal environment for sperm maturation is determined by the secretory activity of epididymal epithelial cells. Thus, the correct answer is option 'B'.
Vasa efferentia are the ductules leading from[2010]- a)testicular lobules to rete testis
- b)rete testis to vas deferens
- c)vas deferens to epididymis
- d)epididymis to urethra
Correct answer is option 'B'. Can you explain this answer?
Vasa efferentia are the ductules leading from
[2010]
a)
testicular lobules to rete testis
b)
rete testis to vas deferens
c)
vas deferens to epididymis
d)
epididymis to urethra
|
Pooja Saha answered |
Vasa efferentia are ductules leading from rete testis to vas deferens. The rete testis is an anastomosing network of tubules located in the hilum of the testicles that carries sperm from the seminiferous tubules to the vasa efferentia.
Receptors for sperm binding in mammals are present on: (2021)- a)Perivitelline space
- b) Zona pellucida
- c)Corona radiata
- d)Vitelline membrane
Correct answer is option 'B'. Can you explain this answer?
Receptors for sperm binding in mammals are present on: (2021)
a)
Perivitelline space
b)
Zona pellucida
c)
Corona radiata
d)
Vitelline membrane
|
Mira Joshi answered |
The secretions of the acrosome help the sperm enter into the cytoplasm of the ovum through the zona pellucida and the plasma membrane.
Which of these is not an important component of initiation of parturition in humans ? [2015 RS]- a)Synthesis of prostaglandins
- b)Release of oxytocin
- c)Release of prolactin
- d)Increase in estrogen and progesterone ratio
Correct answer is option 'C'. Can you explain this answer?
Which of these is not an important component of initiation of parturition in humans ? [2015 RS]
a)
Synthesis of prostaglandins
b)
Release of oxytocin
c)
Release of prolactin
d)
Increase in estrogen and progesterone ratio
|
Rajesh Datta answered |
(c) The role of prolactin is not concerned with initiation of parturition in humans. Prolactin is responsible for milk synthesis in mammary glands. When the levels of estrogen and progesterone become low at parturition, then anterior pituitary activates to release prolactin.
Which of the following is formed first out of the following in growing foetus: hairs, limbs and digits, heart, eye lids?- a)Eye lids
- b)Limbs and digits
- c)Heart
- d)Hairs on head
Correct answer is option 'C'. Can you explain this answer?
Which of the following is formed first out of the following in growing foetus: hairs, limbs and digits, heart, eye lids?
a)
Eye lids
b)
Limbs and digits
c)
Heart
d)
Hairs on head
|
|
Deepanshi Mishra answered |
In growing foetus first of all heart is formed. Doctor diagnose the foetus by hearing the heart sound firstly, after that other organs develope. Cardiovascular developments starts at 3rd to 6th week of pregnancy. Heart beat can be heard at starting of 4th week.
How many sperms are formed by 4 primary spermatocytes? - a)1
- b)4
- c)32
- d)16
Correct answer is option 'D'. Can you explain this answer?
How many sperms are formed by 4 primary spermatocytes?
a)
1
b)
4
c)
32
d)
16
|
|
Juhi Reddy answered |
Each primary spermatocyte undergoes first meiotic division to produce 2 secondary spermatocytes, which further proceeds to second meiotic division to form 2 spermatids. So, each primary spermatocyte produces 4 sperms.
Which of the following hormone levels will cause release of ovum (ovulation) from the graffian follicle? (2020)- a)Low concentration of LH
- b)Low concentration of FSH
- c)High concentration of Estrogen
- d)High concentration of Progesterone
Correct answer is option 'C'. Can you explain this answer?
Which of the following hormone levels will cause release of ovum (ovulation) from the graffian follicle? (2020)
a)
Low concentration of LH
b)
Low concentration of FSH
c)
High concentration of Estrogen
d)
High concentration of Progesterone
|
|
Ananya Das answered |
LH (Leutenizing hormone) is produced by pituitary gland in the brain. It triggers ovulation & promotes the development of corpus luteum by rupture of graafian follicle. Which high concentration of estrogen is relesed by moture graafian follicle
The permissible use of the technique amniocentesis is for
[2010]
- a)Detecting sex of the unborn foetus
- b)Artificial insemination
- c)Transfer of embryo into the uterus of the surrogate mother
- d)Detecting genetic abnormality
Correct answer is option 'D'. Can you explain this answer?
The permissible use of the technique amniocentesis is for
[2010]
a)
Detecting sex of the unborn foetus
b)
Artificial insemination
c)
Transfer of embryo into the uterus of the surrogate mother
d)
Detecting genetic abnormality
|
Arindam Khanna answered |
Amniocentesis is a medical procedure in which amniotic fluid (the protective fluid seen around the foetus) is used to detect the genetic abnormality of the foetus.
This procedure can also be used to detect the sex of the unborn foetus, but, this is unethical and is not allowed to do. Therefore, the permissible use of the technique "amniocentesis" is detecting genetic abnormality.
This procedure can also be used to detect the sex of the unborn foetus, but, this is unethical and is not allowed to do. Therefore, the permissible use of the technique "amniocentesis" is detecting genetic abnormality.
In sectional view of female reproductive system, which one is correctly labeled?
- a)Infundibulum(IV), Perimetrium(V)
- b)Fimbriae(V), Endometrium(I)
- c)Infundibulum(III), Fimbriae(IV)
- d)Uterus(II), Ovary(III)
Correct answer is option 'C'. Can you explain this answer?
In sectional view of female reproductive system, which one is correctly labeled?
a)
Infundibulum(IV), Perimetrium(V)
b)
Fimbriae(V), Endometrium(I)
c)
Infundibulum(III), Fimbriae(IV)
d)
Uterus(II), Ovary(III)
|
|
Sakshi Kasture answered |
This is the same diagram in ncert and there u will get all the names. finger like projections called as fimbre & part next of fimbre called as infundibulum
Which of the following arise from endoderm?- a)Eye
- b)Heart
- c)Pigment cells
- d)Lungs
Correct answer is option 'D'. Can you explain this answer?
Which of the following arise from endoderm?
a)
Eye
b)
Heart
c)
Pigment cells
d)
Lungs
|
|
Anjali Iyer answered |
Ectoderm is the germ layer that develops primarily into skin and neural tissue. Mesoderm primarily develops into muscle tissues and red blood cells. Endoderm develops into many of the internal organs including the gastrointestinal tract, respiratory tract, and endocrine system.
Immediately after ovulation, the mammalian egg is covered by a membrane known as- a)chorion
- b)zona pellucida
- c)corona radiata
- d)vitelline membrane
Correct answer is option 'C'. Can you explain this answer?
Immediately after ovulation, the mammalian egg is covered by a membrane known as
a)
chorion
b)
zona pellucida
c)
corona radiata
d)
vitelline membrane
|
|
Navya Tiwari answered |
The mammalian egg is covered by a series of membranes that protect it and aid in fertilization. Immediately after ovulation, the egg is surrounded by a membrane known as the zona pellucida.
Explanation:
Zona Pellucida:
- The zona pellucida is a glycoprotein layer that forms around the mammalian egg immediately after ovulation.
- It is secreted by the egg as it travels through the oviduct towards the uterus.
- The zona pellucida is composed of three layers: an outer layer, a middle layer, and an inner layer.
- The outer layer is the thinnest and is composed of glycoproteins that help to bind sperm to the zona pellucida.
- The middle layer is the thickest and is composed of a matrix of glycoproteins and proteoglycans.
- The inner layer is the thinnest and is composed of glycoproteins that are involved in the sperm-binding process.
Functions of the Zona Pellucida:
- The zona pellucida plays a key role in fertilization, as it is the first barrier that sperm must penetrate in order to reach the egg.
- The glycoproteins on the surface of the zona pellucida bind to specific receptors on the surface of sperm, allowing them to attach and begin the process of fertilization.
- Once sperm have attached to the zona pellucida, they release enzymes that help to dissolve the outer layer, allowing them to penetrate to the egg.
Other Membranes Surrounding the Egg:
- In addition to the zona pellucida, the mammalian egg is also surrounded by a layer of follicle cells called the corona radiata.
- The corona radiata is composed of cells that have surrounded the egg within the follicle and are released along with the egg during ovulation.
- The corona radiata provides additional protection to the egg and helps to guide sperm towards the zona pellucida.
Conclusion:
In conclusion, immediately after ovulation, the mammalian egg is covered by a membrane known as the zona pellucida. This glycoprotein layer plays a key role in fertilization by allowing sperm to bind to its surface and penetrate to the egg. The corona radiata, another layer of follicle cells, also surrounds the egg and provides additional protection during fertilization.
Explanation:
Zona Pellucida:
- The zona pellucida is a glycoprotein layer that forms around the mammalian egg immediately after ovulation.
- It is secreted by the egg as it travels through the oviduct towards the uterus.
- The zona pellucida is composed of three layers: an outer layer, a middle layer, and an inner layer.
- The outer layer is the thinnest and is composed of glycoproteins that help to bind sperm to the zona pellucida.
- The middle layer is the thickest and is composed of a matrix of glycoproteins and proteoglycans.
- The inner layer is the thinnest and is composed of glycoproteins that are involved in the sperm-binding process.
Functions of the Zona Pellucida:
- The zona pellucida plays a key role in fertilization, as it is the first barrier that sperm must penetrate in order to reach the egg.
- The glycoproteins on the surface of the zona pellucida bind to specific receptors on the surface of sperm, allowing them to attach and begin the process of fertilization.
- Once sperm have attached to the zona pellucida, they release enzymes that help to dissolve the outer layer, allowing them to penetrate to the egg.
Other Membranes Surrounding the Egg:
- In addition to the zona pellucida, the mammalian egg is also surrounded by a layer of follicle cells called the corona radiata.
- The corona radiata is composed of cells that have surrounded the egg within the follicle and are released along with the egg during ovulation.
- The corona radiata provides additional protection to the egg and helps to guide sperm towards the zona pellucida.
Conclusion:
In conclusion, immediately after ovulation, the mammalian egg is covered by a membrane known as the zona pellucida. This glycoprotein layer plays a key role in fertilization by allowing sperm to bind to its surface and penetrate to the egg. The corona radiata, another layer of follicle cells, also surrounds the egg and provides additional protection during fertilization.
The middle piece of the sperm contains- a)proteins
- b)mitochondria
- c)centriole
- d)nucleus
Correct answer is option 'B'. Can you explain this answer?
The middle piece of the sperm contains
a)
proteins
b)
mitochondria
c)
centriole
d)
nucleus
|
Hansa Sharma answered |
The middle piece of sperm contains mitochondria coiled around the axial filament. They provide energy for the movement of the sperm.
Seminal plasma in human males is rich in_____.- a)Fructose and Calcium
- b)Ribose and Potassium
- c)DNA and testosterone
- d)Glucose and Calcium
Correct answer is 'A'. Can you explain this answer?
Seminal plasma in human males is rich in_____.
a)
Fructose and Calcium
b)
Ribose and Potassium
c)
DNA and testosterone
d)
Glucose and Calcium
|
|
Rahul answered |
The male accessory glands include paired seminal vesicles, a prostate and paired bulbourethral gland. Secretions of these glands constitute the seminal plasma which is rich in Fructose calcium and certain enzymes
The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy? [2010]
- a)Fourth month
- b)Fifth month
- c)Sixth month
- d)Third month
Correct answer is option 'B'. Can you explain this answer?
The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy? [2010]
a)
Fourth month
b)
Fifth month
c)
Sixth month
d)
Third month
|
|
Dipanjan Choudhary answered |
The appearance of hair on the head of the foetus and the first movements are important milestones in pregnancy. The correct answer to this question is option B, which is the fifth month.
Explanation:
The development of the foetus during pregnancy is a gradual process that occurs in different stages. Here are some of the key milestones that occur during the fifth month of pregnancy:
1. Foetal movements:
During the fifth month, the foetus begins to move more actively in the womb. These movements may be felt by the mother as "flutters" or "butterflies" in the stomach. As the foetus grows, its movements will become more noticeable and may even keep the mother awake at night.
2. Appearance of hair:
By the fifth month of pregnancy, the foetus will have developed fine hair on its head. This hair is called lanugo and is usually shed before birth. The lanugo helps to regulate the body temperature of the foetus and protect its skin from the amniotic fluid.
3. Development of the nervous system:
During the fifth month, the nervous system of the foetus continues to develop. The brain and spinal cord are becoming more complex, and the foetus is starting to develop its sense of touch, taste, and smell.
4. Growth and development:
By the fifth month of pregnancy, the foetus is about 10 inches long and weighs around 10 ounces. It is starting to look more like a baby, with distinct facial features and limbs that can move independently.
In conclusion, the appearance of hair on the head of the foetus and the first movements are usually observed during the fifth month of pregnancy. This is an exciting time for expectant parents as they begin to feel the presence of their growing baby.
Explanation:
The development of the foetus during pregnancy is a gradual process that occurs in different stages. Here are some of the key milestones that occur during the fifth month of pregnancy:
1. Foetal movements:
During the fifth month, the foetus begins to move more actively in the womb. These movements may be felt by the mother as "flutters" or "butterflies" in the stomach. As the foetus grows, its movements will become more noticeable and may even keep the mother awake at night.
2. Appearance of hair:
By the fifth month of pregnancy, the foetus will have developed fine hair on its head. This hair is called lanugo and is usually shed before birth. The lanugo helps to regulate the body temperature of the foetus and protect its skin from the amniotic fluid.
3. Development of the nervous system:
During the fifth month, the nervous system of the foetus continues to develop. The brain and spinal cord are becoming more complex, and the foetus is starting to develop its sense of touch, taste, and smell.
4. Growth and development:
By the fifth month of pregnancy, the foetus is about 10 inches long and weighs around 10 ounces. It is starting to look more like a baby, with distinct facial features and limbs that can move independently.
In conclusion, the appearance of hair on the head of the foetus and the first movements are usually observed during the fifth month of pregnancy. This is an exciting time for expectant parents as they begin to feel the presence of their growing baby.
Enzyme for fertilization present in -- a)Acrosome of Sperm
- b)Nucleus of Sperm
- c)Tail of Sperm
- d)None
Correct answer is option 'A'. Can you explain this answer?
Enzyme for fertilization present in -
a)
Acrosome of Sperm
b)
Nucleus of Sperm
c)
Tail of Sperm
d)
None
|
|
Hitakshi Tamta G answered |
In Eutherian mammals the acrosome contains degradative enzymes (including hyaluronidase and acrosin). These enzymes break down the outer membrane of the ovum, called the zona pellucida, allowing the haploid nucleus in the sperm cell to join with the haploid nucleus in the ovum.
So, correct answer is "Acrosome of sperm".
A human female is born with a million of primary oocytes at the time of birth. How many eggs get a chance to mature?
- a)About 1000
- b)More than 500
- c)About 1500
- d)Some 500
Correct answer is option 'D'. Can you explain this answer?
A human female is born with a million of primary oocytes at the time of birth. How many eggs get a chance to mature?
a)
About 1000
b)
More than 500
c)
About 1500
d)
Some 500
|
|
Jithin Unni answered |
Answer:
A human female is born with a million of primary oocytes, which are immature eggs. However, only a small fraction of these oocytes will actually mature into eggs that can be fertilized. The process of egg maturation is called oogenesis and it takes place in the ovaries.
Factors Affecting Egg Maturation:
Several factors influence how many eggs get a chance to mature, including:
- Hormonal signals from the pituitary gland
- The age of the female
- Environmental factors such as stress, diet, and exposure to toxins
Process of Egg Maturation:
The process of egg maturation begins at puberty when the pituitary gland starts producing hormones that stimulate the ovaries. Each month, several immature oocytes begin to mature in response to these hormonal signals. However, only one of these oocytes will actually reach full maturity and be released during ovulation.
Number of Eggs Matured:
On average, a human female will release about 400-500 mature eggs during her reproductive lifetime. This means that out of the million primary oocytes that are present at birth, only a small fraction will actually mature into eggs that can be fertilized.
Conclusion:
Therefore, the correct answer to the question is option 'D', which states that about 500 eggs get a chance to mature.
A human female is born with a million of primary oocytes, which are immature eggs. However, only a small fraction of these oocytes will actually mature into eggs that can be fertilized. The process of egg maturation is called oogenesis and it takes place in the ovaries.
Factors Affecting Egg Maturation:
Several factors influence how many eggs get a chance to mature, including:
- Hormonal signals from the pituitary gland
- The age of the female
- Environmental factors such as stress, diet, and exposure to toxins
Process of Egg Maturation:
The process of egg maturation begins at puberty when the pituitary gland starts producing hormones that stimulate the ovaries. Each month, several immature oocytes begin to mature in response to these hormonal signals. However, only one of these oocytes will actually reach full maturity and be released during ovulation.
Number of Eggs Matured:
On average, a human female will release about 400-500 mature eggs during her reproductive lifetime. This means that out of the million primary oocytes that are present at birth, only a small fraction will actually mature into eggs that can be fertilized.
Conclusion:
Therefore, the correct answer to the question is option 'D', which states that about 500 eggs get a chance to mature.
In which part of sperm, mitochondria are present?- a)Head
- b)Middle piece
- c)Tail
- d)Neck
Correct answer is option 'B'. Can you explain this answer?
In which part of sperm, mitochondria are present?
a)
Head
b)
Middle piece
c)
Tail
d)
Neck
|
|
Jaya Chavan answered |
Mitochondria are present in the middle piece of the sperm.
Explanation:
The sperm is composed of three parts: head, middle piece, and tail.
1. Head:
The head of the sperm contains the nucleus which carries genetic material in the form of DNA.
2. Middle piece:
The middle piece of the sperm contains a large number of mitochondria. Mitochondria are organelles that produce energy in the form of ATP (adenosine triphosphate) for the movement of the sperm.
3. Tail:
The tail of the sperm is also known as the flagellum. It provides motility to the sperm and helps in the movement towards the egg.
Therefore, the correct answer is option 'B' that mitochondria are present in the middle piece of the sperm.
Explanation:
The sperm is composed of three parts: head, middle piece, and tail.
1. Head:
The head of the sperm contains the nucleus which carries genetic material in the form of DNA.
2. Middle piece:
The middle piece of the sperm contains a large number of mitochondria. Mitochondria are organelles that produce energy in the form of ATP (adenosine triphosphate) for the movement of the sperm.
3. Tail:
The tail of the sperm is also known as the flagellum. It provides motility to the sperm and helps in the movement towards the egg.
Therefore, the correct answer is option 'B' that mitochondria are present in the middle piece of the sperm.
Testosterone is secreted by____.- a)Sertoli cells
- b)Leydig cells
- c)Kupffer cells
- d)Mast cells
Correct answer is option 'B'. Can you explain this answer?
Testosterone is secreted by____.
a)
Sertoli cells
b)
Leydig cells
c)
Kupffer cells
d)
Mast cells
|
|
Soumya Dyavanagoudar answered |
Leydig cells are interstial cells present in the testis which produce testosterone .FSH stimulates the production of testosterone
Fixing up of blastocyst in the wall of the uterus is- a)Impregnation
- b)Placentation
- c)Implantation
- d)Fertilization
Correct answer is option 'C'. Can you explain this answer?
Fixing up of blastocyst in the wall of the uterus is
a)
Impregnation
b)
Placentation
c)
Implantation
d)
Fertilization
|
|
Ananya Das answered |
The fixing of the blastocyst in the wall of the uterus is known as implantation. The implantation takes place after seven days of fertilization.
`
Which one of the following statements about human sperm is correct?[2010]- a)Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilisation
- b)The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilisation
- c)Acrosome serves as a sensory structure leading the sperm towards the ovum
- d)Acrosome serves no particular function
Correct answer is option 'B'. Can you explain this answer?
Which one of the following statements about human sperm is correct?
[2010]
a)
Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilisation
b)
The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilisation
c)
Acrosome serves as a sensory structure leading the sperm towards the ovum
d)
Acrosome serves no particular function
|
|
Rhea Sarkar answered |
Acrosome a small pointed structure at the tip of nucleus. It breaks down just before fertilization, releasing hydrolytic enzymes that assist penetration between follicle cells that surrounds the ovum, thus facilitating fertilization.
Acrosome is filled with _________.- a)Lipids
- b)Hormones
- c)Enzymes
- d)None of the above
Correct answer is option 'C'. Can you explain this answer?
Acrosome is filled with _________.
a)
Lipids
b)
Hormones
c)
Enzymes
d)
None of the above
|
|
Hansa Sharma answered |
- The head of mature mammalian sperm is made of elongated nucleus covered by acrosome.
- The acrosome is filled with hydrolytic enzymes that help in fertilization of ovum.
- These enzymes called sperm lysins that dissolve the membranes enveloping the ovum and help the sperm cell to enter the ovum by penetrating egg membrane.
Which of the following secretes the hormone, relaxin, during the later phase of pregnancy? (2021)- a)Foetus
- b)Uterus
- c)Graafian follicle
- d)Corpus luteum
Correct answer is option 'D'. Can you explain this answer?
Which of the following secretes the hormone, relaxin, during the later phase of pregnancy? (2021)
a)
Foetus
b)
Uterus
c)
Graafian follicle
d)
Corpus luteum
|
|
Mira Joshi answered |
In the later phase of pregnancy, a hormone called relaxin is also secreted by the ovary.
Chapter doubts & questions for Human Reproduction - Topic-wise MCQ Tests for NEET 2025 is part of NEET exam preparation. The chapters have been prepared according to the NEET exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for NEET 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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