Hormone secreted by alpha-cells of Pancreas?

Options

A. Insulin
B. Glucagon
C. Somatocrinin
D. Somatostatin

Answer

To solve the question regarding the hormone secreted by the alpha cells of the pancreas, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Cells of the Pancreas**: The pancreas has different types of cells that secrete various hormones. The main types are alpha cells and beta cells.

2. **Understand the Function of Alpha Cells**: Alpha cells are specifically responsible for the secretion of a hormone that plays a crucial role in glucose metabolism.

3. **Determine the Hormone Secreted by Alpha Cells**: The hormone secreted by alpha cells is **glucagon**. Glucagon is responsible for increasing blood sugar levels by promoting the conversion of glycogen to glucose in the liver.

4. **Review Other Options**:
- **Insulin**: This hormone is secreted by beta cells of the pancreas and functions to lower blood sugar levels.
- **Somatocrinone**: Also known as growth hormone-releasing hormone, it is secreted by the hypothalamus, not the pancreas.
- **Somatostatin**: This hormone is secreted by delta cells of the pancreas and regulates the endocrine system and inhibits the secretion of other hormones.

5. **Conclusion**: Based on the functions and sources of the hormones, the correct answer to the question is **glucagon**.

### Final Answer:
The hormone secreted by alpha-cells of the pancreas is **glucagon**.

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