Insulin is produced from:

Options

A. `alpha`-cells
B. `beta`-cell
C. Adrenal cortex
D. Testes

Answer

**Step-by-Step Solution:**

1. **Understanding Insulin**: Begin by defining what insulin is. Insulin is a peptide hormone that plays a crucial role in regulating blood glucose levels. It helps lower blood glucose levels by facilitating the uptake of glucose into cells.

2. **Identifying the Source of Insulin**: Insulin is produced in the pancreas, which is an important gland in the body that has both endocrine and exocrine functions.

3. **Pancreatic Cells**: Within the pancreas, there are specialized clusters of cells known as the islets of Langerhans. These islets contain different types of cells, including alpha cells, beta cells, and delta cells.

4. **Role of Beta Cells**: Among these cells, the beta cells are specifically responsible for the production and secretion of insulin. This distinguishes them from alpha cells, which secrete glucagon (the hormone that raises blood glucose levels), and delta cells, which secrete somatostatin.

5. **Conclusion**: Therefore, the correct answer to the question "Insulin is produced from:" is the beta cells of the pancreas.

**Final Answer**: Insulin is produced from beta cells in the pancreas.

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