Given below are two statements : Statement I : Ovulation is caused by LH surge leading to rupture of Graafian follicles. Statement II : Graafian follicle remaining after ovulation transform into corpus luteum and secretes large amount of estrogen. In the light of the above statements, choose the most appropriate answer from the options given below :
D. Statement I is correct but Statement II is incorrect
Statement I is correct because the rapid secretion of Luteinizing Hormone (LH) leading to its maximum level during the mid-cycle (LH surge) induces the rupture of the Graafian follicle, which causes the release of the ovum (ovulation). Statement II is incorrect because after ovulation, the ruptured Graafian follicle transforms into the corpus luteum. The corpus luteum secretes large amounts of progesterone, not estrogen, which is essential for the maintenance of the endometrium for a potential pregnancy. Therefore, Statement I is correct but Statement II is incorrect.
Related: Zoology — Human Reproduction · All PYQ Banks