The hormone that stimulates the maturation of T-lymphocytes is released from

Options

A. Thyroid gland
B. Thymus
C. Testis
D. Pituitary gland

Answer

To answer the question about which hormone stimulates the maturation of T-lymphocytes and where it is released from, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding T-lymphocytes**: T-lymphocytes, or T-cells, are a type of white blood cell that play a crucial role in the immune response. They are responsible for identifying and responding to foreign particles, such as pathogens.

2. **Identifying the maturation site**: The maturation of T-lymphocytes occurs in a specific organ known as a primary lymphoid organ. This is where T-cells develop and mature before they enter the peripheral blood and lymphatic system.

3. **Analyzing the options**: We have four options to consider:
- Thyroid gland
- Thymus
- Testis
- Pituitary gland

4. **Recognizing the primary lymphoid organ**: Among the options provided, the thymus is the only primary lymphoid organ. The thyroid gland, testis, and pituitary gland do not serve this function in T-cell maturation.

5. **Conclusion**: Therefore, the hormone that stimulates the maturation of T-lymphocytes is released from the thymus.

### Final Answer:
The hormone that stimulates the maturation of T-lymphocytes is released from the **thymus**.

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