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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?
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Verified Answer
Which of the following hormone levels will cause release of ovum (ovul...
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
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Which of the following hormone levels will cause release of ovum (ovul...
Hormonal Regulation of Ovulation:
Ovulation is the process of release of the ovum (egg) from the mature Graafian follicle in the ovary. Hormonal regulation of ovulation involves complex interplay between the hypothalamus, pituitary gland and ovaries, which results in cyclic changes in the levels of gonadotropins (LH and FSH) and ovarian hormones (estrogen and progesterone).
Role of Gonadotropins:
Luteinizing hormone (LH) and follicle-stimulating hormone (FSH) are the two gonadotropins secreted by the anterior pituitary gland that regulate the ovarian cycle.
- FSH stimulates the growth and development of follicles in the ovary.
- LH surge triggers ovulation by causing the rupture of the mature Graafian follicle and release of the ovum.
Role of Estrogen and Progesterone:
Estrogen and progesterone are the two ovarian hormones that play a crucial role in ovulation.
- Estrogen is produced by the developing follicles and increases gradually during the follicular phase of the menstrual cycle.
- High levels of estrogen exert positive feedback on the hypothalamus and pituitary gland, leading to a surge in LH secretion.
- LH surge triggers ovulation by causing the release of enzymes that break down the ovarian follicle and release the ovum.
Therefore, the correct answer is option 'C' - High concentration of Estrogen.
Ovulation is the process of release of the ovum (egg) from the mature Graafian follicle in the ovary. Hormonal regulation of ovulation involves complex interplay between the hypothalamus, pituitary gland and ovaries, which results in cyclic changes in the levels of gonadotropins (LH and FSH) and ovarian hormones (estrogen and progesterone).
Role of Gonadotropins:
Luteinizing hormone (LH) and follicle-stimulating hormone (FSH) are the two gonadotropins secreted by the anterior pituitary gland that regulate the ovarian cycle.
- FSH stimulates the growth and development of follicles in the ovary.
- LH surge triggers ovulation by causing the rupture of the mature Graafian follicle and release of the ovum.
Role of Estrogen and Progesterone:
Estrogen and progesterone are the two ovarian hormones that play a crucial role in ovulation.
- Estrogen is produced by the developing follicles and increases gradually during the follicular phase of the menstrual cycle.
- High levels of estrogen exert positive feedback on the hypothalamus and pituitary gland, leading to a surge in LH secretion.
- LH surge triggers ovulation by causing the release of enzymes that break down the ovarian follicle and release the ovum.
Therefore, the correct answer is option 'C' - High concentration of Estrogen.
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Which of the following hormone levels will cause release of ovum (ovul...
Hormone levels responsible for ovulation
Ovulation is the process in which a mature egg is released from the ovary. This process is regulated by hormones. The correct answer is option C, high concentration of estrogen. Let's understand how estrogen is responsible for ovulation.
Role of estrogen in ovulation
1. Follicular phase: During the follicular phase of the menstrual cycle, the pituitary gland releases follicle-stimulating hormone (FSH) which stimulates the growth of follicles in the ovary.
2. Dominant follicle formation: Among the growing follicles, one follicle becomes dominant and continues to grow. This dominant follicle secretes increasing amounts of estrogen.
3. Estrogen surge: As the estrogen levels rise, they reach a threshold level that triggers a surge of luteinizing hormone (LH) from the pituitary gland.
4. Ovulation: This LH surge triggers ovulation, which is the release of the mature egg from the ovary. The egg then travels through the fallopian tube towards the uterus.
5. Corpus luteum formation: After ovulation, the remaining cells of the follicle form the corpus luteum, which secretes progesterone.
6. Luteal phase: The luteal phase of the menstrual cycle is characterized by high levels of progesterone, which prepares the uterus for possible pregnancy.
Conclusion
In conclusion, high levels of estrogen play a crucial role in ovulation. The estrogen surge triggers the release of LH, which in turn triggers ovulation. Therefore, option C, high concentration of estrogen, is the correct answer.
Ovulation is the process in which a mature egg is released from the ovary. This process is regulated by hormones. The correct answer is option C, high concentration of estrogen. Let's understand how estrogen is responsible for ovulation.
Role of estrogen in ovulation
1. Follicular phase: During the follicular phase of the menstrual cycle, the pituitary gland releases follicle-stimulating hormone (FSH) which stimulates the growth of follicles in the ovary.
2. Dominant follicle formation: Among the growing follicles, one follicle becomes dominant and continues to grow. This dominant follicle secretes increasing amounts of estrogen.
3. Estrogen surge: As the estrogen levels rise, they reach a threshold level that triggers a surge of luteinizing hormone (LH) from the pituitary gland.
4. Ovulation: This LH surge triggers ovulation, which is the release of the mature egg from the ovary. The egg then travels through the fallopian tube towards the uterus.
5. Corpus luteum formation: After ovulation, the remaining cells of the follicle form the corpus luteum, which secretes progesterone.
6. Luteal phase: The luteal phase of the menstrual cycle is characterized by high levels of progesterone, which prepares the uterus for possible pregnancy.
Conclusion
In conclusion, high levels of estrogen play a crucial role in ovulation. The estrogen surge triggers the release of LH, which in turn triggers ovulation. Therefore, option C, high concentration of estrogen, is the correct answer.
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Which of the following hormone levels will cause release of ovum (ovulation) from the graffian follicle? (2020)a)Low concentration of LHb)Low concentration of FSHc)High concentration of Estrogend)High concentration of ProgesteroneCorrect answer is option 'C'. Can you explain this answer?
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Which of the following hormone levels will cause release of ovum (ovulation) from the graffian follicle? (2020)a)Low concentration of LHb)Low concentration of FSHc)High concentration of Estrogend)High concentration of ProgesteroneCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for Which of the following hormone levels will cause release of ovum (ovulation) from the graffian follicle? (2020)a)Low concentration of LHb)Low concentration of FSHc)High concentration of Estrogend)High concentration of ProgesteroneCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of Which of the following hormone levels will cause release of ovum (ovulation) from the graffian follicle? (2020)a)Low concentration of LHb)Low concentration of FSHc)High concentration of Estrogend)High concentration of ProgesteroneCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
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