Which is not correct about sustentacular cells

Options

A. It is situated in between the germinal epithelial cells
B. It is related with the nutrition of sperm
C. It form blood testis barrier
D. It form testosterone from oestrogen

Answer

To determine which statement about sustentacular cells is incorrect, we will analyze the characteristics and functions of these cells step by step.

### Step-by-Step Solution:

1. **Identify the Location**:
- Sustentacular cells, also known as Sertoli cells, are located in the seminiferous tubules of the testes. This is a key point to remember as it helps in identifying their role in the male reproductive system.

2. **Understand Their Functions**:
- **Barrier Formation**: One of the primary functions of sustentacular cells is to form the blood-testis barrier. This barrier protects developing sperm from the immune system and maintains a suitable environment for spermatogenesis.
- **Support for Spermatogenesis**: These cells provide structural support and nourishment to the developing sperm cells (spermatocytes and spermatids) during the process of spermatogenesis.
- **Hormonal Secretion**: Sustentacular cells secrete various substances, including androgen-binding protein (ABP), which helps in concentrating testosterone in the seminiferous tubules, and inhibin, which regulates the production of follicle-stimulating hormone (FSH).

3. **Analyze the Statements**:
- Now, we will evaluate the given statements about sustentacular cells:
- **Statement 1**: "It is situated between the germinal epithelial cells." (This is correct)
- **Statement 2**: "It acts as a barrier between blood and testes." (This is correct)
- **Statement 3**: "It is involved in the secretion of hormones." (This is correct)
- **Statement 4**: "It does not provide nutrition to the sperm." (This is incorrect)

4. **Conclusion**:
- Based on the analysis, the statement that is not correct about sustentacular cells is that they do not provide nutrition to the sperm. In fact, they do play a crucial role in nourishing the developing sperm.

### Final Answer:
The incorrect statement about sustentacular cells is: "It does not provide nutrition to the sperm."

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