Thymosin hormone is secreted by

Options

A. Thyroid gland
B. Parathyroid gland
C. Thymus gland
D. Hypothalamus

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the gland that secretes the hormone thymosin.

2. **Identifying the Options**: The options provided are:
- Thyroid gland
- Parathyroid gland
- Thymus gland
- Hypothalamus

3. **Analyzing the Function of Thymosin**: Thymosin is a peptide hormone that plays a crucial role in the immune system by promoting the proliferation of T lymphocytes, which are essential for adaptive immunity.

4. **Locating the Source of Thymosin**: The thymosin hormone is specifically secreted by the thymus gland, which is a small lymphoid organ located below the thyroid gland.

5. **Eliminating Incorrect Options**:
- **Thyroid Gland**: This gland is responsible for secreting hormones like thyroxine (T4) and triiodothyronine (T3).
- **Parathyroid Gland**: This gland secretes parathyroid hormone (PTH), which regulates calcium levels in the blood.
- **Hypothalamus**: This region of the brain secretes various hormones that control the pituitary gland but does not secrete thymosin.

6. **Conclusion**: Based on the analysis, the correct answer is that thymosin is secreted by the thymus gland.

**Final Answer**: Thymosin hormone is secreted by the thymus gland.

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