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Hormonal Regulation of Gastrointestinal Motility and Secretion

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Hormonal Regulation of Gastrointestinal Motility and Secretion

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Questions and Answers

What is the main stimulus for the secretion of gastrin?

Luminal factors in the small intestine

Presence of fat in the stomach

Vagal stimulation

Increased gastric acidity (PH > 2) (correct)

Which hormone stimulates the normal growth of gastrointestinal mucosa?

Secretin

Vasoactive intestinal peptide (VIP)

Cholecystokinin (CCK)

Gastrin (correct)

What is the chemical transmitter for stimulating the secretion of gastrin?

Dopamine

Gastrin releasing peptide (correct)

Norepinephrine

Acetylcholine

Which hormone is responsible for the contraction of lower esophageal sphincter preventing reflux of gastric contents into the esophagus?

Gastrin Signup and view all the answers

In large doses, which hormone stimulates insulin and glucagon secretion?

Gastrin Signup and view all the answers

What stimulates the secretion of cholecystokinin (CCK)?

Long chain fatty acids Signup and view all the answers

Which hormone is responsible for stimulating the contraction of the gall bladder and relaxation of the sphincter of Oddi?

Cholecystokinin (CCK) Signup and view all the answers

What is the major action of vasoactive intestinal peptide (VIP) in response to products of digestion?

Stimulation of excessive intestinal secretion rich in electrolytes and water Signup and view all the answers

Which hormone decreases the gastric emptying into the duodenum when the upper small intestine is over supplied with food products?

Gastric inhibitory peptide (GIP) Signup and view all the answers

In response to which stimuli does somatostatin inhibit gastric secretion and motility?

Products of digestion Signup and view all the answers