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Digestive Hormone Summary

Digestive Hormone Summary - jejunum& ileum Fat or...

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Gastrointestinal (GI) Hormones Hormone Site of Release Stimulants for Release Organ Affected Effect on Organ Gastrin G cells of the antrum, duodenum & jejunum Antrum distention; vagus nerve impulses triggered by site/smell of food; proteins Stomach Stimulates HCl secretion & mucosal growth Secretin (opposes gastrin action) S cells of the duodenum, jejunum & ileum Acidic chyme in duodenum Stomach Pancreas Stimulates pepsinogen secretion; decreases gastric motility Stimulates bicarbonate secretion Cholecystokinin (CCK) I cells of the duodenum,
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Unformatted text preview: jejunum & ileum Fat or protein-rich chyme in duodenum Stomach Pancreas Gallbladder Decreases gastric emptying Stimulates secretion of enzymes & bicarbonate Contracts gallbladder Gastric inhibitory peptide or Glucose-dependent insulinotropic polypeptide (GIP) K cells of the duodenum & jejunum Fatty acids, amino acids & some carbs Stomach Pancreas Decreases gastric motility Stimulates insulin synthesis & secretion Motilin M cells of the stomach, duodenum & jejunum Fasted state Stomach, SI, LI Increases motility...
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