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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?

    <p>Gastrin</p> Signup and view all the answers

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

    <p>Gastrin</p> Signup and view all the answers

    What stimulates the secretion of cholecystokinin (CCK)?

    <p>Long chain fatty acids</p> 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?

    <p>Cholecystokinin (CCK)</p> Signup and view all the answers

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

    <p>Stimulation of excessive intestinal secretion rich in electrolytes and water</p> 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?

    <p>Gastric inhibitory peptide (GIP)</p> Signup and view all the answers

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

    <p>Products of digestion</p> Signup and view all the answers

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