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Hormonal control of GI motility (Gastrin (Stimuli for secretion (Protein,…
Hormonal control of GI motility
Gastrin
Stimuli for secretion
Protein
Distension
Nerve
Acid inhibits release
Site of secretion
G cells of the antrum, duodenum, and jejunum
Actions
Stimulates gastric acid secretion
Stimulates mucosal growth
Cholecystokinin
Stimuli for secretion
Protein
Fat
Acid
Site of secretion
I cells of the duodenum, jejunum, and ileum
Actions
Stimulates pepsin secretion
Stimulates pancreatic bicarbonate secretion
Stimulates gallbladder contraction
Stimulates growth of exocrine pancreas
Inhibits gastric emptying
Secretin
Stimuli for secretion
Acid
Fat
Site of secretion
S cells of the duodenum, jejunum, and ileum
Actions
Stimulates pepsin secretion
Stimulates pancreatic bicarbonate secretion
Stimulates biliary bicarbonate secretion
Stimulates growth of exocrine pancreas
Inhibits gastric acid secretion
Gastric inhibitory peptide
Stimuli for secretion
Protein
Fat
Carbohydrate
Site of secretion
K cells of the duodenum and jejunum
Actions
Stimulates insulin release
Inhibits gastric acid secretion
Motilin
Stimuli for secretion
Fat
Acid
Nerve
Site of secretion
M cells of the duodenum and jejunum
Actions
Stimulates gastric motility
Stimulates intestinal motility