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Test: Parturition & Lactation - NEET MCQ


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20 Questions MCQ Test Topic-wise MCQ Tests for NEET - Test: Parturition & Lactation

Test: Parturition & Lactation for NEET 2024 is part of Topic-wise MCQ Tests for NEET preparation. The Test: Parturition & Lactation questions and answers have been prepared according to the NEET exam syllabus.The Test: Parturition & Lactation MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Parturition & Lactation below.
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Test: Parturition & Lactation - Question 1

What is the reflex that leads to the expulsion of baby called?

Detailed Solution for Test: Parturition & Lactation - Question 1

Parturition is initiated by the fetus and the placenta. Leading to oxytocin signaling and uterine contractions. This reflex is called fetal ejection reflex.

Test: Parturition & Lactation - Question 2

What is injected to induce delivery in humans?

Detailed Solution for Test: Parturition & Lactation - Question 2
  • Oxytocin is the stimulant released from anterior pituitary to increase contractions of the uterine wall.
  • Decreased levels of oxytocin can result in the inability to push the baby out.
  • In such scenarios, the patient is injected with intravenous oxytocin to induce uterine contractions to deliver the baby.
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Test: Parturition & Lactation - Question 3

What is colostrum rich in?

Detailed Solution for Test: Parturition & Lactation - Question 3
  • The colostrum is produced by the mammary glands for the first few days after the baby is born.
  • The purpose is to protect the baby from the antigens it will be exposed after entering the world for the first time.

Hence it is enriched with antibodies.

Test: Parturition & Lactation - Question 4

Gestation period in human beings is about 

Detailed Solution for Test: Parturition & Lactation - Question 4

Gestation is the period of time between conception and birth. It is calculated from the first day of the woman's last menstrual period. The gestation period of human beings is 270 days to 280 (approximately). It is usually about 36 weeks on average.

Test: Parturition & Lactation - Question 5

What is the correct sequence for parturition to occur?

Detailed Solution for Test: Parturition & Lactation - Question 5
  • Parturition starts with the signal released by the fetus and the placenta.
  • These act on the pituitary to release oxytocin.
  • Oxytocin acts as a stimulant leading to contractions of the uterine muscles.
  • The uterine contractions feedbacks to release more oxytocin from the pituitary.
  • This results in more powerful contractions of the uterus until the baby is delivered in the process of parturition.
Test: Parturition & Lactation - Question 6

Q. Which hormone is responsible for inducing strong uterine contractions during parturition (childbirth)?

Detailed Solution for Test: Parturition & Lactation - Question 6

Oxytocin is the hormone responsible for inducing strong uterine contractions during parturition (childbirth).

  • Oxytocin is produced by the hypothalamus and released by the pituitary gland.
  • It stimulates the muscles of the uterus to contract, aiding in the delivery of the baby.
  • Additionally, oxytocin helps in the expulsion of the placenta after childbirth.

Estrogen, progesterone, and prolactin have different roles in pregnancy and lactation but do not directly induce labor contractions.

Test: Parturition & Lactation - Question 7

What is injected to induce delivery in humans?

Detailed Solution for Test: Parturition & Lactation - Question 7
  • Oxytocin is the stimulant released from anterior pituitary to increase contractions of the uterine wall.
  • Decreased levels of oxytocin can result in the inability to push the baby out.
  • In such scenarios, the patient is injected with intravenous oxytocin to induce uterine contractions to deliver the baby.
Test: Parturition & Lactation - Question 8

Which of these is not an important component of initiation of parturition in humans? 

Detailed Solution for Test: Parturition & Lactation - Question 8

Parturition is the process of giving birth to a baby. Oxytocin is the hormone released by the posterior pituitary, it induces contraction in uterine muscles during parturition and induces labour. Estrogen, progesterone and prostaglandins also play an important role during parturition. Prolactin plays a significant role during lactation.

Test: Parturition & Lactation - Question 9

The average duration of human pregnancy is about 9 months which is called the ______.

Detailed Solution for Test: Parturition & Lactation - Question 9

The development of the fetus from the time of fertilization in the womb of its mother is called the gestation period. In humans, the gestation period is for about 9 months or approximately 280 days. It is calculated from the incipience of their last menstrual period.

Test: Parturition & Lactation - Question 10

Parturition is induced by a complex ______ mechanism.

Detailed Solution for Test: Parturition & Lactation - Question 10
  • Parturition is induced by a complex neuroendocrine mechanism as the signals for parturition originate from the fully developed foetus and the placenta produce foetal ejection reflex.
  • This causes the release of oxytocin from the maternal pituitary which in turn causes stronger uterine contractions.
Test: Parturition & Lactation - Question 11

The signals for parturition originate from:

Detailed Solution for Test: Parturition & Lactation - Question 11

Parturition is induced by signals from both the fully developed foetus and the placenta. It induces mild uterine contractions called foetal ejection reflex.

Test: Parturition & Lactation - Question 12

The mammary glands of the female undergo differentiation ______ pregnancy and starts producing milk towards the ______ of pregnancy.

Detailed Solution for Test: Parturition & Lactation - Question 12
  • The mammary glands of the female undergo differentiation during pregnancy and start producing milk towards the end of pregnancy by the process called lactation.
  • This process begins when the mammary gland is exposed to estrogen at puberty and is completed during the third trimester of pregnancy.
Test: Parturition & Lactation - Question 13

The milk produced during the initial few days of lactation is called:

Detailed Solution for Test: Parturition & Lactation - Question 13

The milk produced during the initial few days of lactation is called colostrum which contains several antibodies absolutely essential to develop resistance for newborn babies.

Test: Parturition & Lactation - Question 14

Decrease of which hormones promote Milk ejection at child birth:

Detailed Solution for Test: Parturition & Lactation - Question 14

At birth, when the oestrogen and progesterone levels fall due to loss of the placenta, prolactin is no longer inhibited and it stimulates the alveoli to secrete milk.

Test: Parturition & Lactation - Question 15

Antibodies in colostrum provide new-borns with__________.

Detailed Solution for Test: Parturition & Lactation - Question 15

The antibodies in the colostrum help the body of the baby, which has been exposed to the external world full of different antigens, the ability to fight. This is called immunity.

Test: Parturition & Lactation - Question 16

Which one of the following is not the function of placenta?

Detailed Solution for Test: Parturition & Lactation - Question 16
  • The major function of placenta is to provide the nutrition to the growing embryo and facilitates the removal of carbon dioxide and waste products by diffusion.
  • The placenta also secretes estrogen however, not oxytocin.
  • Oxytocin is a hormone secreted by posterior pituitary gland during parturition.

So, the correct option is 'Secrets oxytocin during parturition'.

Test: Parturition & Lactation - Question 17

Read the following statement
(a) Inhibitory proteins are released by epididymis which conserve energy of sperms.
(b) Epididymis provides more ATP energy to sperms.
(c) The signals of parturition originate from placenta and CNS.
(d) Lactational amenorrhea is used as contraception.

How many of the above statements are correct?

Detailed Solution for Test: Parturition & Lactation - Question 17

Only c and d is correct

Test: Parturition & Lactation - Question 18

On fertilization, the urine of mother will contain: 

Detailed Solution for Test: Parturition & Lactation - Question 18
  • The chorionic cells secrete a hormone named human chorionic gonadotrophin (hCG) which resembles and takes over the job of pituitary LH during pregnancy. The hCG maintains the corpus luteum and stimulates it to secrete progesterone.
  • The progesterone maintains the endometrial lining and causes it to grow throughout pregnancy. This maintains menstruation.

So, the correct answer is 'hCG'.

Test: Parturition & Lactation - Question 19

Identify the correct statement:    

Detailed Solution for Test: Parturition & Lactation - Question 19

Menstrual cycle occur in all primates and all mammals with few exception are viviparous.

Test: Parturition & Lactation - Question 20

Onset of pregnancy:    

Detailed Solution for Test: Parturition & Lactation - Question 20
  • During the menstruation cycle, rapid secretion of LH induces rupture of Graafian follicle and thereby the release of an ovum (ovulation).
  • The ovulation (ovulatory phase) is followed by the luteal phase during which the remaining parts of the Graafian follicle converts into the corpus luteum if fertilization occurs.
  • The corpus luteum secretes large amounts of progesterone which maintains the events of pregnancy.
  • During pregnancy, all events of the menstrual cycle stop and there is no menstruation and ovulation

So, the correct answer is 'Inhibits further ovulation'

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