Which of the following can't be taken as the character/function of the sertoli cell ?

Options

A. Release of ATP
B. Contribute of major part of seman
C. Nourishment to spermatids
D. Formation of blood testes barrier

Answer

To solve the question regarding the functions of Sertoli cells, we will analyze each option provided in the context of what Sertoli cells do.

### Step-by-Step Solution:

1. **Understanding Sertoli Cells**: Sertoli cells are specialized cells located in the seminiferous tubules of the testes. They play a crucial role in the process of spermatogenesis, which is the production of sperm.

2. **Analyzing the Options**:
- **Option 1: Contribution to the release of ATP**: Sertoli cells do produce ATP, which is essential for the energy needs of developing sperm cells. This is a function of Sertoli cells.
- **Option 2: Contribution to the major part of the semen**: This option states that Sertoli cells contribute to semen. However, this is incorrect because the major components of semen are produced by seminal vesicles, prostate gland, and bulbourethral glands, not Sertoli cells.
- **Option 3: Nourishment to the spermatids**: Sertoli cells are often referred to as "nurse cells" because they provide nourishment to developing sperm cells (spermatids). This is indeed a function of Sertoli cells.
- **Option 4: Formation of the blood-testis barrier**: Sertoli cells also form the blood-testis barrier, which is important for protecting developing sperm from the immune system and maintaining a specialized environment for spermatogenesis.

3. **Identifying the Incorrect Function**: After analyzing all the options, we find that:
- Option 1 is a function of Sertoli cells.
- Option 2 is NOT a function of Sertoli cells (this is the incorrect option).
- Option 3 is a function of Sertoli cells.
- Option 4 is a function of Sertoli cells.

### Conclusion:
The option that cannot be taken as a character/function of the Sertoli cell is **Option 2: Contribution to the major part of the semen**.

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