Which one of the following hormones inhibits gastric secretion

Options

A. Enterogasterone
B. Gastrin
C. CCK
D. PZ

Answer

To solve the question "Which one of the following hormones inhibits gastric secretion?" we will analyze each option provided and determine which hormone is responsible for inhibiting gastric secretion.

### Step-by-Step Solution:

1. **Understand the Question**: We need to identify which hormone among the given options inhibits gastric secretion.

2. **List the Options**: The options provided are:
- A) Enterogastron
- B) Gastrin
- C) CCK (Cholecystokinin)
- D) PZ (possibly referring to Pancreozymin)

3. **Analyze Each Option**:
- **Option A: Enterogastron**: This hormone is secreted by the mucosa of the small intestine, specifically in the duodenum. It is known to inhibit gastric secretion, especially in response to the presence of fatty acids in the small intestine.
- **Option B: Gastrin**: This hormone stimulates gastric secretion. It is released in response to food intake and promotes the secretion of gastric acid. Therefore, it does not inhibit gastric secretion.
- **Option C: CCK (Cholecystokinin)**: While CCK does have various digestive functions, including stimulating the gallbladder to release bile and slowing gastric emptying, it does not primarily inhibit gastric secretion.
- **Option D: PZ (Pancreozymin)**: This hormone is involved in stimulating the pancreas to release digestive enzymes but does not inhibit gastric secretion.

4. **Conclusion**: Based on the analysis, the hormone that inhibits gastric secretion is **Enterogastron** (Option A).

### Final Answer:
**Enterogastron** inhibits gastric secretion.