Med-Surg Ch. 34 GI Regulatory Substances
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Gastrin
Hormonal regulator; increases gastric juice (HCl), increases motility.
Secretin
Hormonal regulator; inhibits gastric secretion somewhat, increases pancreatic juice (bicarb), inhibits stomach contractions.
Cholecystokinin
Hormonal regulator; releases bile into duodenum, increases pancreatic secretions, inhibits gastric secretion somewhat.
Histamine
Local regulator; increases gastric acid.
Norepinephrine
Neuroregulator; generally inhibits secretions, decreases motility.
Acetylcholine
Neuroregulator; increases gastric acid, increases motility.
