Which of the following stimulates the secretion of gastric juice :

Options

A. Gastrin
B. Enterogasterone
C. Secretin
D. Hepatocrinin

Answer

To determine which of the following stimulates the secretion of gastric juice, we will analyze the options provided and understand the roles of different hormones involved in gastric juice secretion.

### Step-by-Step Solution:

1. **Understanding Gastric Juice**: Gastric juice is a digestive fluid produced by the stomach, containing hydrochloric acid, enzymes, and mucus. Its secretion is essential for digestion.

2. **Identifying Key Hormones**: The primary hormone responsible for stimulating gastric juice secretion is **gastrin**. It is released by the pyloric part of the stomach when food enters.

3. **Role of Gastrin**: Gastrin stimulates the gastric glands in the stomach to secrete gastric juice. It also enhances gastric motility, which is the movement of the stomach that aids in digestion.

4. **Analyzing Other Hormones**:
- **Enterogastron (Gastric Inhibitory Polypeptide)**: This hormone is secreted from the duodenum and inhibits gastric juice secretion and motility, acting antagonistically to gastrin.
- **Secretin**: This hormone is also released from the duodenum and primarily stimulates the pancreas and liver, while inhibiting gastric secretion and motility.
- **Hepatocrinin**: This term is incorrect; the correct term is **enterocrinin**, which stimulates the release of enzymes in the small intestine but does not influence gastric juice secretion.

5. **Conclusion**: Based on the analysis, the hormone that stimulates the secretion of gastric juice is **gastrin**. Therefore, the correct answer is option number 1.

### Final Answer:
**Gastrin stimulates the secretion of gastric juice.**

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