Digestive hormones of the GI tract

This is a brief video detailing the main hormones in the GI tract, where they are localized, and their primary functions. I created this presentation with Google Slides. Image were created or taken from Wikimedia Commons I created this video with the YouTube Video Editor. ADDITIONAL TAGS: HORMONE LOCALIZATION MAIN PHYSIOLOGIC ACTIONS Gastrin Gastric antrum, duodenum (G cells) -stimulate secretion of gastric acid and intrinsic factor from parietal cells -stimulate secretion of pepsinogen from chief cells -promotes gastric and intestinal motility, mucosal growth Cholecystokinin (CCK) Duodenum, jejunum (I cells) -stimulate gallbladder contraction -stimulates release of pancreatic enzymes -relaxes sphincter of Oddi for release of bile and enzymes -role in inducing satiety Secretin Duodenum, jejunum (S cells) -stimulate secretion of HCO3 from pancreas -inhibits gastrin and gastric acid secretion Vasoactive intestinal peptide (VIP) Enteric nerves -increases water and electrolyte secretion from pancreas and gut -relaxes smooth muscles (via nitric oxide) of the gut Gastric inhibitory polypeptide (GIP) Duodenum, jejunum (K cells) -reduces gastric acid secretion and intestinal motility -stimulates insulin release Motilin Throughout the gut (Mo cells and ECL cells) -increases small bowel motility (MMC during fasting) and gastric emptying Somatostatin Stomach, small intestine, and pancreas (D cells) -inhibits secretion and action of many hormones, including all of the above Digestive hormones in the GI tract