Glucagon hormone is secreted by

Options

A. Beta cells of islets of Langerhans
B. Alpha cells of islets of Langerhans
C. Acidophilic cells of adenohypophysis
D. Basophilic cells of adenohypophysis.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the source of secretion for the glucagon hormone.

2. **Identifying the Options**: The options provided are:
- A) Beta cells of islets of Langerhans
- B) Alpha cells of islets of Langerhans
- C) Acidophilic cells of adenohypophysis
- D) Basophilic cells of adenohypophysis

3. **Analyzing Each Option**:
- **Option A**: Beta cells of islets of Langerhans secrete insulin, which lowers blood glucose levels. Therefore, this option is incorrect.
- **Option B**: Alpha cells of islets of Langerhans secrete glucagon, which increases blood glucose levels. This option is correct.
- **Option C**: Acidophilic cells of adenohypophysis (anterior pituitary) secrete growth hormone and prolactin, not glucagon. This option is incorrect.
- **Option D**: Basophilic cells of adenohypophysis secrete hormones such as ACTH, TSH, FSH, and LH, but not glucagon. This option is also incorrect.

4. **Conclusion**: The correct answer is **B) Alpha cells of islets of Langerhans**.

5. **Final Answer**: Glucagon hormone is secreted by the alpha cells of islets of Langerhans in the pancreas.

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