Hyper secretion of thyroxine causes

Options

A. Graves's disease
B. Addison's disease
C. Myxoedema
D. Acromegaly

Answer

**Step-by-Step Solution:**

1. **Understanding Hypersecretion of Thyroxine**:
- Hypersecretion refers to the excessive production of a hormone. In this case, it pertains to thyroxine, which is produced by the thyroid gland.

2. **Identifying the Condition**:
- When there is hypersecretion of thyroxine, the condition is known as hyperthyroidism. This means that the body has an excess of thyroid hormones.

3. **Linking Hyperthyroidism to Diseases**:
- Hyperthyroidism can lead to various health issues. One of the most common diseases associated with hyperthyroidism is Graves' disease.

4. **Understanding Graves' Disease**:
- Graves' disease is an autoimmune disorder where the immune system mistakenly attacks the thyroid gland, causing it to produce too much thyroxine.

5. **Symptoms of Graves' Disease**:
- Common symptoms include weight loss despite normal eating, goiter (enlargement of the thyroid gland), bulging eyes, fatigue, anxiety, irritability, and rapid heartbeat.

6. **Evaluating Other Options**:
- Addison's disease is caused by the undersecretion of hormones from the adrenal cortex, making it an incorrect option.
- Myxedema is associated with hypothyroidism (undersecretion of thyroxine), which is also incorrect.
- Acromegaly is due to the oversecretion of growth hormone, not thyroxine, making it incorrect as well.

7. **Conclusion**:
- Therefore, the correct answer to the question is that hypersecretion of thyroxine causes Graves' disease.

**Final Answer**: Hypersecretion of thyroxine causes Graves' disease.

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