Hormonal Regulation of Gastrointestinal Motility and Secretion

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What is the main stimulus for the secretion of gastrin?

Increased gastric acidity (PH > 2)

Which hormone stimulates the normal growth of gastrointestinal mucosa?


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

Gastrin releasing peptide

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


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


What stimulates the secretion of cholecystokinin (CCK)?

Long chain fatty acids

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

Cholecystokinin (CCK)

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

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

Gastric inhibitory peptide (GIP)

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

Products of digestion

Test your knowledge of the hormonal regulation of gastrointestinal motility and secretion, including the classification of GIT hormones and their functions. Explore the role of enteroendocrine cells in controlling gastrointestinal functions.

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