The hormone inhibin is secreted by :

Options

A. Leydig cells
B. sertoli cells
C. Cowper's glands
D. Prostate gland

Answer

**Step-by-Step Solution:**

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

2. **Source of Inhibin in Females**: In females, inhibin is secreted by the granulosa cells of the ovaries. These cells are involved in the development of ovarian follicles and the production of hormones.

3. **Source of Inhibin in Males**: In males, inhibin is secreted by Sertoli cells, which are located in the seminiferous tubules of the testes. Sertoli cells support spermatogenesis, and inhibin helps regulate the levels of FSH, which is essential for sperm production.

4. **Evaluating the Options**:
- **Option A: Leydig cells** - These cells are responsible for producing androgens (male hormones) and do not secrete inhibin. Therefore, this option is incorrect.
- **Option B: Sertoli cells** - As established, Sertoli cells secrete inhibin in males. This option is correct.
- **Option C: Copus gland** - This gland does not secrete hormones but releases mucoproteins for lubrication. Hence, this option is incorrect.
- **Option D: Prostate gland** - The prostate gland secretes prostatic fluid, which contributes to seminal fluid but does not secrete inhibin. Thus, this option is incorrect.

5. **Conclusion**: Based on the evaluation of the options, the correct answer is that inhibin is secreted by Sertoli cells in males and granulosa cells in females.

**Final Answer**: Inhibin is secreted by Sertoli cells in males and granulosa cells in females.

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