Question

In females, hormone inhibin is secreted by

• A. Granulosa and cumulus oophorus cells
• B. Granulosa cells and zona pellucida
• C. Granulosa and theca cells
• D. Granulosa cells and corpus luteum

Answer 1

The correct option is D Granulosa cells and corpus luteum

Inhibin
Inhibin is a protein hormone secreted by Sertoli cells of the testes, placenta, granulosa cells, and corpus luteum of the ovary.

Role of inhibin
Inhibin suppresses the synthesis of FSH by the anterior pituitary gland.

Zona pellucida
Zona pellucida is a glycoprotein layer secreted by the follicular cells that surround the plasma membrane of the ovum. It is secreted by the secondary oocyte before ovulation.

Cumulus oophorus
The mature secondary oocyte is attached to the wall of the Graffian follicle through a pedicel called cumulus oophorus. It possesses the cumulus oophorus cells.

Theca cells
Theca cells are the endocrine cells associated with the ovarian follicles which produce androgens.

Final answer (A) Granulosa cells and corpus luteum