Secretin hormone stimulates:

Options

A. Gastric glands
B. Pancreas
C. Gall bladder
D. Crypts of Lieberkuhn

Answer

**Step-by-Step Solution:**

1. **Identify the Source of Secretin:**
- Secretin is a hormone that is secreted by S-cells located in the duodenum, which is the first part of the small intestine.

2. **Understand the Function of Secretin:**
- The primary function of secretin is to regulate the pH of the small intestine by stimulating the pancreas to release bicarbonate-rich pancreatic juice. This helps neutralize the acidic chyme that enters the duodenum from the stomach.

3. **Evaluate the Options:**
- The question provides multiple options regarding what secretin stimulates:
- **Option 1: Gastric gland** - This is incorrect because secretin does not act on the gastric glands.
- **Option 2: Pancreas** - This is correct as secretin stimulates the pancreas to release its secretions.
- **Option 3: Gallbladder** - This is incorrect; secretin does not primarily stimulate the gallbladder.
- **Option 4: Crypts of Lieberkühn** - This is also incorrect as secretin does not stimulate these intestinal glands.

4. **Conclusion:**
- Based on the evaluation of the options, the correct answer is that secretin hormone stimulates the pancreas.

**Final Answer:**
Secretin hormone stimulates the pancreas.

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