Hormone that stimulates stomach to secrete gastric juice is

Options

A. gastrin
B. renin
C. enterokinase
D. enterogasterone

Explanation

To answer the question about which hormone stimulates the stomach to secrete gastric juice, we can analyze the options provided:

1. **Gastrin**: This hormone is produced by G cells in the stomach lining. Its primary function is to stimulate the secretion of gastric juice, which contains hydrochloric acid and digestive enzymes. Gastrin also promotes gastric motility and helps in the digestion process.

2. **Renin**: This hormone is secreted by the kidneys and is primarily involved in regulating blood pressure. It does not have a role in stimulating gastric juice secretion.

3. **Enterokinase**: This enzyme is involved in the digestive process, specifically in converting trypsinogen (an inactive enzyme) into trypsin (an active enzyme) in the small intestine. It does not stimulate gastric juice secretion.

4. **Enterogastrin**: This hormone is known to inhibit gastric secretion and gastric emptying. It does not stimulate the secretion of gastric juice.

Based on this analysis, the hormone that stimulates the stomach to secrete gastric juice is **Gastrin**.

### Step-by-Step Solution:
1. Identify the function of each hormone listed in the options.
2. Determine which hormone is responsible for stimulating gastric juice secretion.
3. Conclude that Gastrin is the correct answer based on its role in the digestive process.