Thyroxin produced by ______

Options

A. Pituitary gland
B. Adrenal gland
C. Thyroid gland
D. Testes

Answer

**Step-by-Step Solution:**

1. **Understanding Thyroxine**: Begin by recognizing what thyroxine is. It is a hormone that plays a crucial role in regulating metabolism and growth in the body.

2. **Identifying the Source**: Thyroxine is produced in the body through a specific process involving various hormones.

3. **Role of Thyrotrophin-Releasing Hormone**: The process starts with the hypothalamus releasing thyrotrophin-releasing hormone (TRH). This hormone signals the anterior pituitary gland.

4. **Activation of Anterior Pituitary**: The anterior pituitary gland, upon receiving TRH, secretes thyroid-stimulating hormone (TSH).

5. **Function of TSH**: TSH travels through the bloodstream to the thyroid gland, which is an endocrine gland located in the neck.

6. **Production of Thyroxine**: In the thyroid gland, TSH stimulates the production of thyroxine (T4) and triiodothyronine (T3) from the amino acid tyrosine and the mineral iodine.

7. **Conclusion**: Therefore, the final answer to the question is that thyroxine is produced by the thyroid gland.

**Final Answer**: Thyroxin is produced by the thyroid gland.

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