Secretion of gastric juice is controlled by

Options

A. Enterogasterone
B. Cholecystokinin
C. Gastrin
D. Motilin

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which factor controls the secretion of gastric juice in the stomach.

2. **Identifying the Options**: The options provided are:
- Enterogastron
- Cholecystokinin
- Gastrin
- Motilin

3. **Function of Gastric Juice**: Gastric juice is a digestive fluid produced in the stomach, primarily composed of hydrochloric acid (HCl), pepsinogen, and intrinsic factor. Its secretion is crucial for digestion.

4. **Role of Hormones**: The secretion of gastric juice is primarily regulated by hormones. When food enters the stomach, it stimulates the release of specific hormones that promote gastric juice secretion.

5. **Analyzing Each Option**:
- **Enterogastron**: Secreted by the duodenum, it inhibits gastric secretion, thus not controlling the secretion of gastric juice.
- **Cholecystokinin**: Released by the duodenum, it stimulates pancreatic juice secretion and bile release, but does not directly control gastric juice secretion.
- **Gastrin**: Secreted by G-cells located in the pyloric portion of the stomach and the duodenum. Gastrin promotes the secretion of gastric juice and increases stomach movement.
- **Motilin**: A peptide hormone that controls smooth muscle contractions in the gastrointestinal tract, but does not directly influence gastric juice secretion.

6. **Conclusion**: Based on the analysis, the hormone that controls the secretion of gastric juice is **Gastrin**. Therefore, the correct answer is option **3 (Gastrin)**.

---