Grewe's disedse is due to :

Options

A. Hyperactivity of thyroid gland
B. Hypoactivity of adrenal cortex
C. Hyperactivity of adrenal medulla
D. Hypoactivity of islets of langerhans

Answer

**Step-by-Step Solution:**

1. **Identify the Disease**: The question refers to "Grave's disease." It is important to recognize that this is an autoimmune disorder.

2. **Understand Autoimmune Disorders**: Autoimmune disorders occur when the immune system mistakenly attacks the body's own cells. In the case of Grave's disease, the immune system targets the thyroid gland.

3. **Determine the Gland Involved**: The options provided include hyperactivity of the thyroid gland, hypoactivity of the adrenal gland, hyperactivity of the adrenal medulla, and hypoactivity of the islets of Langerhans. Since Grave's disease is related to the thyroid gland, we focus on that.

4. **Explain Hyperactivity of the Thyroid Gland**: Hyperactivity of the thyroid gland means that the gland is overproducing hormones, specifically T3 (triiodothyronine) and T4 (thyroxine). This overproduction leads to an increased metabolic rate in the body.

5. **Conclude the Correct Answer**: Given that Grave's disease is characterized by hyperactivity of the thyroid gland, the correct answer to the question is "hyperactivity of thyroid glands."

**Final Answer**: Grave's disease is due to hyperactivity of the thyroid gland.

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