In females, hormone inhibin is secreted by

Options

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

Answer

To answer the question "In females, hormone inhibin is secreted by," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Inhibin**: Inhibin is a hormone that plays a crucial role in the regulation of the reproductive system. It primarily inhibits the production of Follicle Stimulating Hormone (FSH) from the pituitary gland.

2. **Identifying the Source of Inhibin in Females**: In females, inhibin is secreted by specific cells in the ovaries. The main sources of inhibin are:
- **Granulosa Cells**: These are the cells that line the ovarian follicles and are involved in the development of oocytes (egg cells).
- **Corpus Luteum**: This structure forms from the remnants of the follicle after ovulation and also secretes inhibin.

3. **Eliminating Incorrect Options**: The other options mentioned in the question (theca cells, cumulus oophorus cells, zona pellucida) do not secrete inhibin. The theca cells are involved in the production of androgens, and the zona pellucida is the protective layer surrounding the oocyte.

4. **Final Answer**: Therefore, the correct answer to the question is that in females, the hormone inhibin is secreted by **granulosa cells and corpus luteum**.