Secretin stimulates secretion of

Options

A. Liver
B. Gall bladder
C. Pancreas
D. Stomach.

Answer

**Step-by-Step Solution:**

1. **Understanding Secretin**: Secretin is a gastrointestinal hormone that plays a crucial role in the digestive process. It is primarily released in response to the presence of acidic chyme in the small intestine.

2. **Functions of Secretin**: The main functions of secretin include:
- Inhibiting intestinal motility, which means it reduces the movement of the intestines.
- Stimulating the secretion of pancreatic juice, particularly the non-enzymatic components, which are important for neutralizing stomach acid and aiding digestion.
- Stimulating the liver to produce bile, which is essential for fat digestion.
- Inhibiting gastric acid secretion in the stomach.

3. **Analyzing the Options**:
- **Liver**: While secretin does stimulate the liver to secrete bile, it is not the primary function of secretin.
- **Gallbladder**: Secretin does not have a direct role in stimulating gallbladder secretion.
- **Pancreas**: Secretin is well-known for stimulating the pancreas to release pancreatic juice, making this a strong candidate.
- **Stomach**: Secretin inhibits gastric acid secretion and does not stimulate it.

4. **Conclusion**: Given the functions of secretin and the analysis of the options, the correct answer is that secretin primarily stimulates the secretion of pancreatic juice from the pancreas.

**Final Answer**: Secretin stimulates secretion of pancreatic juice (option 3).

---