Question

Which of the following hormones exhibit inhibitory effects?

• A. Enterogastrone
• B. Secretin
• C. Somatostatin
• D. All of the above

Answer 1

The correct option is D All of the above

Enterogastrone (Gastric Inhibitory Peptide or GIP) is secreted by the epithelium of the duodenum. It acts on the stomach and inhibits the secretion of gastric juice. It also inhibits gastric motility. It slows down the gastric contraction.

Secretin stimulates the release of bicarbonates into the pancreatic juice. In the liver, it stimulates the secretion of bile. In the stomach, it inhibits gastric secretion and motility.

Somatostatin is secreted by the stomach and duodenum. In the stomach, it inhibits gastric secretion. In the small intestine, it inhibits intestinal absorption. In the gallbladder and liver, it inhibits contraction and release of bile.