Question

Which part of the ovary acts as an endocrine gland after ovulation?

• A. Stroma
• B. Vitelline gland
• C. Graffian follicle
• D. Oocyte

Answer 1

Answer: (C)

Graffian follicle

In a typical menstruation cycle, both LH and FSH attain a peak level in the middle of the cycle (about 14${}^{th}$ day). Rapid secretion of LH leading to its maximum level during the mid-cycle called LH surge 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 transform as the corpus luteum. The corpus luteum assumes endocrine function and secretes large amounts of progesterone hormone, which is essential for maintenance of the endometrium. Such an endometrium is necessary for implantation of the fertilized ovum and other events of pregnancy.