The growth maintenance and function of duct system seminiferous tubules and leydig cells are regulated respectively by

Options

A. FSH , Testosterone & LH
B. Testosterone , FSH & LH
C. FSH , LH & ICSH
D. Testosterone , LH & FSH

Answer

To answer the question regarding the regulation of the growth, maintenance, and function of the duct system, seminiferous tubules, and Leydig cells, we can break it down step by step.

### Step-by-Step Solution:

1. **Duct System Regulation**:
- The duct system is primarily regulated by **testosterone**.
- Testosterone is secreted by the **Leydig cells** in the testes.
- This hormone promotes the development and maintenance of the duct system, ensuring it remains functional and robust.

2. **Seminiferous Tubules Regulation**:
- The growth and function of the seminiferous tubules, where spermatozoa are produced, are regulated by **Follicle Stimulating Hormone (FSH)**.
- FSH is crucial for the development of the testicular structures and supports the maturation of sperm cells within the seminiferous tubules.

3. **Leydig Cells Regulation**:
- The Leydig cells themselves are regulated by **Luteinizing Hormone (LH)**.
- LH stimulates the Leydig cells to produce testosterone, which is essential for various functions, including the development of male secondary sexual characteristics and the maintenance of the reproductive system.

### Summary of Regulation:
- **Duct System**: Regulated by **Testosterone** (from Leydig cells)
- **Seminiferous Tubules**: Regulated by **Follicle Stimulating Hormone (FSH)**
- **Leydig Cells**: Regulated by **Luteinizing Hormone (LH)**