Gastrointestinal hormones
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Gastrointestinal hormones
Gastrointestinal system
Anatomy and physiology
Digestion and absorption
Gastrointestinal hormones
Gastrointestinal tract motility
Summary
Gastrointestinal hormones are released by the digestive system and have various functions. Some of these hormones include:
Secretin: secreted by the S cells in the small intestine, regulates gastrin and pancreatic enzyme secretion. Cholecystokinin: recreated by the small intestine, promotes gallbladder contraction and regulates nutrient-stimulated enzyme secretion. Insulin: secreted by the pancreas (B cells of the pancreatic islets), reduces blood's glucose levels. Glucagon: secreted by the pancreas (A cells of the pancreatic islets), increases blood glucose levels. Ghrelin: released by the stomach and increases hunger Leptin: released by fat cells, decreases hunger Somatostatin: inhibits the release of some other hormones such as gastrin, growth hormone, prolactin, and insulin. Gastrin: secreted by the G cells in the stomach and duodenum, stimulates gastric acid and pancreatic enzyme secretion. Pancreatic peptide: secreted by the pancreas, slows down small intestine motility. Peptide Y: secreted by the pancreas (islets alpha cells), inhibits the release of pancreatic enzymes.