NEETZoologyHuman Reproduction
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): In the absence of fertilisation, the corpus luteum is maintained to initiate the follicular phase of a new menstrual cycle. Reason (R): Degeneration of the corpus luteum causes a rapid fall in progesterone, removing the negative feedback on the pituitary and allowing FSH levels to rise again. In th
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (A)
- BBoth (A) and (R) are true but (R) is not the correct explanation of (A)
- C(A) is true but (R) is false
- D(A) is false but (R) is true
Correct answer
D. (A) is false but (R) is true
Step-by-step solution
In the absence of fertilisation, the corpus luteum does not persist; it degenerates. This degeneration causes the disintegration of the endometrium, leading to menstruation and marking a new cycle. Therefore, the Assertion is false. The degeneration of the corpus luteum causes a rapid decline in progesterone levels. High levels of progesterone normally exert a negative feedback on the anterior pituitary. When progesterone falls, this negative feedback is removed, allowing the pituitary to secrete Follicle Stimulati