secretin /se·cre·tin/ (se-kre´tin) a hormone secreted by the duodenal and jejunal mucosa when acid chyme enters the intestine; it stimulates secretion of pancreatic juice and, to a lesser extent, bile and intestinal secretion.
secretin
se·cre·tin (s -kr t n)n. A polypeptide hormone produced in the duodenum, especially on contact with acid, that stimulates secretion of pancreatic juice. |
secretin
[sikrē′tin]
Etymology: L, secernere, to separate
a digestive hormone that is produced by the S cells lining the duodenum and jejunum when protein of partially digested food enters the intestine from the stomach. It stimulates the pancreas to produce a fluid high in salts but low in enzymes. Secretin has a limited stimulating effect on the production of bile. See also pancreas.
secretin
a hormone secreted by the mucosa of the duodenum and jejunum when acid chyme enters the intestine; carried by the blood, it stimulates the secretion of pancreatic juice and, to a lesser extent, bile and intestinal secretion.
secretin test
an examination of the gastric and duodenal contents after intravenous administration of exogenous secretin; useful in the diagnosis of disorders affecting pancreatic exocrine function, for example, pancreatitis and neoplastic disease.
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