Regulation of Gastric Function (Secretions)
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7 Terms
What is the enterogastric reflex?
Inhibitory signals sent from the duodenum to the stomach via the enteric nervous system
What triggers the enterogastric reflex?
Presence of acid and semi-digested fats in the duodenum
What hormones are released by duodenal enteroendocrine cells in response to chyme?
secretin and cholecystokinin (CCK) stimulate the pancreas and gallbladder
What is the effect of secretin and cholecystokinin (CCK) on gastric function?
suppress gastric secretion
What is the function of the pyloric sphincter during digestion?
Contracts tightly to limit chyme entry into the duodenum
Why does the pyloric sphincter contract tightly?
To give the duodenum time to process chyme
What is the role of gastrin-inhibiting peptide (GIP)?
stimulates insulin secretion in preparation for processing nutrients about to be absorbed by the small intestine.