Secretin stimulates the production of

Options

A. Saliva .
B. gastric juice .
C. bile .
D. Pancreatic juice .

Answer

To solve the question "Secretin stimulates the production of," we need to analyze the options provided and understand the function of secretin in the human body.

### Step-by-Step Solution:

1. **Understanding Secretin**:
- Secretin is a hormone produced by the S cells in the lining of the small intestine, particularly in response to acidic chyme entering from the stomach. Its primary role is to regulate the pH of the small intestine.

2. **Analyzing the Options**:
- **Option 1: Saliva**:
- This option is incorrect. Saliva production is primarily stimulated by the hormone thyroxine and is not influenced by secretin.

- **Option 2: Gastric Juice**:
- This option is also incorrect. Gastric juice is stimulated by the hormone gastrin, which acts on parietal cells in the stomach to secrete gastric acid.

- **Option 3: Bile**:
- This option is incorrect as well. Bile is produced by the liver and stored in the gallbladder, and its production is not directly stimulated by secretin.

- **Option 4: Pancreatic Juice**:
- This is the correct option. Secretin stimulates the pancreas to produce pancreatic juice, which is rich in bicarbonate ions. This helps neutralize the acidic chyme entering the small intestine from the stomach.

3. **Conclusion**:
- Based on the analysis of the options, the correct answer is that secretin stimulates the production of pancreatic juice.

### Final Answer:
- **Secretin stimulates the production of pancreatic juice.**