Choose the the false one .

Options

A. Thymus is degenerated in old aged persons resulting in a decreased thymosins production leading to weak immune response
B. Cortisol, a type of glucocorticoids stimulates the RBC production
C. Small amount of androgenic steroids is secreted by adrenal cortex
D. Diabetes is not successfully treated with insulin

Answer

To solve the question "Choose the false one," we need to evaluate the provided statements about hormones and their functions.

### Step-by-Step Solution:

1. **Evaluate Statement 1**: The statement claims that the thymus is desensitized in all individuals, leading to decreased thymosin production and a weak immune response.
- **Analysis**: This statement is correct. The thymus is an endocrine gland that produces thymosin, which is essential for immune response. A decrease in thymosin due to thymus atrophy can indeed weaken immunity.

2. **Evaluate Statement 2**: This statement asserts that cortisol, a type of glucocorticoid, stimulates RBC production.
- **Analysis**: This statement is also correct. Cortisol is a glucocorticoid hormone produced by the adrenal cortex and does play a role in stimulating red blood cell (RBC) production.

3. **Evaluate Statement 3**: The statement mentions that a small amount of androgenic steroid is secreted by the adrenal cortex.
- **Analysis**: This statement is correct as well. The adrenal cortex does secrete small amounts of androgenic steroids, including testosterone, which are produced in both males and females.

4. **Evaluate Statement 4**: This statement claims that diabetes is not successfully treated with insulin.
- **Analysis**: This statement is false. Insulin is a critical treatment for diabetes, particularly for Type 1 diabetes, where insulin production is insufficient. Insulin helps lower blood glucose levels, which is essential for managing diabetes.

### Conclusion:
The false statement among the options is Statement 4: "Diabetes is not successfully treated with insulin."