Question

The hormone that stimulates the stomach to secrete gastric juice is

• A. enterokinase
• B. enterogastrone
• C. gastrin
• D. renin.

Answer 1

The Correct Option is C

To answer the question regarding which hormone stimulates the stomach to secrete gastric juice, we need to understand the role of each option given in the context of digestive processes:

1. Enterokinase: This is not a hormone. It is an enzyme found in the small intestine, crucial for converting trypsinogen into trypsin. Thus, it plays a role in protein digestion but not directly in stimulating gastric juice secretion.
2. Enterogastrone: This hormone is produced in the intestines and inhibits gastric gland secretions and stomach motility. It slows down the digestive process when fatty food is present, making it opposite in function to stimulating gastric juice production.
3. Gastrin: Gastrin is a hormone produced by the G-cells in the stomach lining. It plays a critical role in digestion by stimulating the parietal cells of the stomach to secrete gastric acids for breaking down proteins and other substances, effectively increasing gastric juice secretion.
4. Renin: There might be a confusion here with "rennin" (an enzyme in the stomach of some animals) or "renin" (an enzyme related to blood pressure regulation), neither of which deal with stimulating gastric juice. Hence, it does not fit in the context of gastric secretions.

Given this, the most appropriate answer, in this case, is gastrin as it directly stimulates the stomach to secrete gastric juice, aiding in the digestion process. Therefore, the correct answer is gastrin.