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During bleeding phase of menstrual cycle unfertilised secondary oocyte undergoes autolysis. The interplay of hormones then is
- a)progesterone and estrogen continue the hypertrophy of endometrial lining
- b)prolactin and progesterone reduces LH level causing regression of corpus luteum
- c)progesterone inhibits the release of LH from pituitary causing regression of corpus luteum
- d)prolactin and estrogen inhibits progesterone secretion leading to sloughing off uterine lining
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
During bleeding phase of menstrual cycle unfertilised secondary oocyte...
If fertilisation does not occur, the secondary oocyte undergoes autolysis and progesterone (secreted by persistent corpus luteum) inhibits the release of LH from pituitary. Reduction of LH level causes regression of corpus luteum by autolysis and thus fall in the progesterone level in the blood. Due to deficiency of progesterone, uterine lining sloughs off causing bleeding. This whole phase is called bleeding phase.
This question is part of UPSC exam. View all NEET courses
Most Upvoted Answer
During bleeding phase of menstrual cycle unfertilised secondary oocyte...
Explanation:
During the menstrual cycle, the interplay of hormones is crucial in regulating the various phases of the cycle. Let's break down the options given and explain why option C is the correct answer:
a) Progesterone and estrogen continue the hypertrophy of endometrial lining:
- This statement is incorrect because during the bleeding phase of the menstrual cycle, the endometrial lining is shedding and being eliminated. Progesterone and estrogen are involved in building up the endometrial lining during the previous phase (proliferative phase) of the menstrual cycle, but not during the bleeding phase.
b) Prolactin and progesterone reduce LH level causing regression of corpus luteum:
- This statement is partially correct. Prolactin and progesterone do play a role in reducing the levels of luteinizing hormone (LH), which ultimately leads to the regression of the corpus luteum. However, this occurs during the luteal phase of the menstrual cycle, not during the bleeding phase.
c) Progesterone inhibits the release of LH from the pituitary causing regression of corpus luteum:
- This statement is correct. During the bleeding phase of the menstrual cycle, the corpus luteum from the previous cycle starts to regress. Progesterone, which is produced by the corpus luteum, inhibits the release of luteinizing hormone (LH) from the pituitary gland. This decrease in LH levels leads to the regression of the corpus luteum.
d) Prolactin and estrogen inhibit progesterone secretion leading to sloughing off uterine lining:
- This statement is incorrect. Prolactin and estrogen do not directly inhibit progesterone secretion during the menstrual cycle. Progesterone levels decrease naturally when the corpus luteum regresses, leading to the sloughing off of the uterine lining during the bleeding phase.
In conclusion, option C is the correct answer as it accurately describes the hormonal interplay during the bleeding phase of the menstrual cycle. Progesterone inhibits the release of LH from the pituitary, causing regression of the corpus luteum.
During the menstrual cycle, the interplay of hormones is crucial in regulating the various phases of the cycle. Let's break down the options given and explain why option C is the correct answer:
a) Progesterone and estrogen continue the hypertrophy of endometrial lining:
- This statement is incorrect because during the bleeding phase of the menstrual cycle, the endometrial lining is shedding and being eliminated. Progesterone and estrogen are involved in building up the endometrial lining during the previous phase (proliferative phase) of the menstrual cycle, but not during the bleeding phase.
b) Prolactin and progesterone reduce LH level causing regression of corpus luteum:
- This statement is partially correct. Prolactin and progesterone do play a role in reducing the levels of luteinizing hormone (LH), which ultimately leads to the regression of the corpus luteum. However, this occurs during the luteal phase of the menstrual cycle, not during the bleeding phase.
c) Progesterone inhibits the release of LH from the pituitary causing regression of corpus luteum:
- This statement is correct. During the bleeding phase of the menstrual cycle, the corpus luteum from the previous cycle starts to regress. Progesterone, which is produced by the corpus luteum, inhibits the release of luteinizing hormone (LH) from the pituitary gland. This decrease in LH levels leads to the regression of the corpus luteum.
d) Prolactin and estrogen inhibit progesterone secretion leading to sloughing off uterine lining:
- This statement is incorrect. Prolactin and estrogen do not directly inhibit progesterone secretion during the menstrual cycle. Progesterone levels decrease naturally when the corpus luteum regresses, leading to the sloughing off of the uterine lining during the bleeding phase.
In conclusion, option C is the correct answer as it accurately describes the hormonal interplay during the bleeding phase of the menstrual cycle. Progesterone inhibits the release of LH from the pituitary, causing regression of the corpus luteum.
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During bleeding phase of menstrual cycle unfertilised secondary oocyte undergoes autolysis. The interplay of hormones then isa)progesterone and estrogen continue the hypertrophy of endometrial liningb)prolactin and progesterone reduces LH level causing regression of corpus luteumc)progesterone inhibits the release of LH from pituitary causing regression of corpus luteumd)prolactin and estrogen inhibits progesterone secretion leading to sloughing off uterine liningCorrect answer is option 'C'. Can you explain this answer?
Question Description
During bleeding phase of menstrual cycle unfertilised secondary oocyte undergoes autolysis. The interplay of hormones then isa)progesterone and estrogen continue the hypertrophy of endometrial liningb)prolactin and progesterone reduces LH level causing regression of corpus luteumc)progesterone inhibits the release of LH from pituitary causing regression of corpus luteumd)prolactin and estrogen inhibits progesterone secretion leading to sloughing off uterine liningCorrect answer is option 'C'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about During bleeding phase of menstrual cycle unfertilised secondary oocyte undergoes autolysis. The interplay of hormones then isa)progesterone and estrogen continue the hypertrophy of endometrial liningb)prolactin and progesterone reduces LH level causing regression of corpus luteumc)progesterone inhibits the release of LH from pituitary causing regression of corpus luteumd)prolactin and estrogen inhibits progesterone secretion leading to sloughing off uterine liningCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for During bleeding phase of menstrual cycle unfertilised secondary oocyte undergoes autolysis. The interplay of hormones then isa)progesterone and estrogen continue the hypertrophy of endometrial liningb)prolactin and progesterone reduces LH level causing regression of corpus luteumc)progesterone inhibits the release of LH from pituitary causing regression of corpus luteumd)prolactin and estrogen inhibits progesterone secretion leading to sloughing off uterine liningCorrect answer is option 'C'. Can you explain this answer?.
During bleeding phase of menstrual cycle unfertilised secondary oocyte undergoes autolysis. The interplay of hormones then isa)progesterone and estrogen continue the hypertrophy of endometrial liningb)prolactin and progesterone reduces LH level causing regression of corpus luteumc)progesterone inhibits the release of LH from pituitary causing regression of corpus luteumd)prolactin and estrogen inhibits progesterone secretion leading to sloughing off uterine liningCorrect answer is option 'C'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about During bleeding phase of menstrual cycle unfertilised secondary oocyte undergoes autolysis. The interplay of hormones then isa)progesterone and estrogen continue the hypertrophy of endometrial liningb)prolactin and progesterone reduces LH level causing regression of corpus luteumc)progesterone inhibits the release of LH from pituitary causing regression of corpus luteumd)prolactin and estrogen inhibits progesterone secretion leading to sloughing off uterine liningCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for During bleeding phase of menstrual cycle unfertilised secondary oocyte undergoes autolysis. The interplay of hormones then isa)progesterone and estrogen continue the hypertrophy of endometrial liningb)prolactin and progesterone reduces LH level causing regression of corpus luteumc)progesterone inhibits the release of LH from pituitary causing regression of corpus luteumd)prolactin and estrogen inhibits progesterone secretion leading to sloughing off uterine liningCorrect answer is option 'C'. Can you explain this answer?.
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