Gastrointestinal hormones

• Produced in: Stomach
• Stimulated by: Digestion, partially digested proteins, autonomic astimulation, alcohol caffeine.

Secretory effect: Increases gastric secretion

Motility effect: Increases gastric motility

Produced in: Duodenum

Stimulated by: Acidity of chyme

Secretory effects: decreases gastric secretion, stimulates pancreatic and bile secretion.

Decreases gastric motility

Produced in Duodenum

Stimulated by peptides and fatty acids

Secretory effects: Decreases gastric secretion, stimulates pancreatic secretions, causes gallblader to contract, relaxation of heptopancreatic ampullar spincter.

Strongly decreases gastric motility.

• Gastrin
• secretin
• Cholecystokinin