Select the incorrect statement.

Options

A. The lumen of seminiferous tubule contains Leydig cells which secrete testosterone
B. Testicular hormones are called androgens
C. In human , testes are extra - abdominal
D. Spermatogonium undergo mitotic divisions

Answer

To solve the question of selecting the incorrect statement, we will analyze each of the provided options one by one.

### Step-by-Step Solution:

1. **Read the Statements**: We have four statements to evaluate. We need to identify which one is incorrect.

2. **Evaluate Statement 1**:
- **Statement**: "The lumen of seminiferous tubule contains Leydig cells with secreted testosterone."
- **Analysis**: Leydig cells are not located in the lumen of seminiferous tubules; they are found in the interstitial space outside the seminiferous tubules. The lumen contains Sertoli cells, which support sperm development. Therefore, this statement is **incorrect**.

3. **Evaluate Statement 2**:
- **Statement**: "Testicular hormones are called androgens."
- **Analysis**: This statement is correct. Androgens are indeed the hormones produced by the testes, including testosterone.

4. **Evaluate Statement 3**:
- **Statement**: "In humans, testes are extra-abdominal."
- **Analysis**: This statement is also correct. The testes are located outside the abdominal cavity, in the scrotum, which is considered extra-abdominal.

5. **Evaluate Statement 4**:
- **Statement**: "Spermatogonium undergoes mitotic division."
- **Analysis**: This statement is correct as well. Spermatogonia are diploid cells that divide by mitosis to produce more spermatogonia or differentiate into primary spermatocytes.

6. **Conclusion**: After evaluating all statements, we find that:
- Statement 1 is the only incorrect statement. Therefore, the answer to the question is **Statement 1**.

### Final Answer:
The incorrect statement is: **"The lumen of seminiferous tubule contains Leydig cells with secreted testosterone."**

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