The hormone testosterone in testes is secreted by

Options

A. Leydig's cells
B. Sertoli cells
C. Pituitary gland
D. Testis

Answer

**Step-by-Step Solution:**

1. **Identify the Hormone and Organ**: The question asks about the secretion of the hormone testosterone in the testes.

2. **Understand the Role of Testes**: The testes are the primary male reproductive organs responsible for producing sperm and hormones, including testosterone.

3. **Identify the Cells in the Testes**: Within the testes, there are different types of cells, including Leydig cells (also known as interstitial cells) and Sertoli cells.

4. **Determine the Function of Leydig Cells**: Leydig cells are specifically responsible for the production and secretion of testosterone. They are located in the interstitial space between the seminiferous tubules.

5. **Eliminate Incorrect Options**:
- **Sertoli Cells**: These cells support and nourish developing sperm but do not secrete testosterone.
- **Pituitary Gland**: While it produces hormones that regulate the testes, it does not secrete testosterone itself.
- **Testes**: This is the organ where testosterone is produced, but the specific cells responsible for its secretion are Leydig cells.

6. **Conclude the Answer**: Therefore, the hormone testosterone in the testes is secreted by Leydig cells.

**Final Answer**: Leydig cells (interstitial cells) in the testes secrete testosterone.

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