This gastrointestinal hormone stimulates insulin secretion

Options

A. Gastrin
B. CCK
C. Secretin
D. GIP

Answer

To answer the question about which gastrointestinal hormone stimulates insulin secretion, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Role of Gastrointestinal Hormones**: Gastrointestinal hormones are secreted by the cells in the gastrointestinal tract and play crucial roles in digestion and metabolism.

2. **Identify Key Hormones**: Some of the important gastrointestinal hormones include:
- Gastrin: Involved in stimulating gastric acid secretion.
- Cholecystokinin (CCK): Stimulates the pancreas and gallbladder for secretion.
- Secretin: Stimulates the pancreas to release bicarbonate.
- Glucose-dependent Insulinotropic Peptide (GIP): Specifically involved in insulin secretion.

3. **Focus on Insulin Secretion**: The question specifically asks for the hormone that stimulates insulin secretion. Among the hormones listed, GIP is known for its role in this process.

4. **Confirm the Source of GIP**: GIP is secreted by K-cells located in the intestinal mucosa. Its primary function is to enhance insulin secretion in response to glucose intake.

5. **Conclude the Answer**: Therefore, the gastrointestinal hormone that stimulates insulin secretion is Glucose-dependent Insulinotropic Peptide (GIP).

### Final Answer:
The gastrointestinal hormone that stimulates insulin secretion is GIP (Glucose-dependent Insulinotropic Peptide).

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