NEET (NTA)-National Eligibility cum Entrance Test (Medical) Biology Human Physiology-Digestion and Absorption Revision (Page 13 of 23)

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Important Hormones of GIT

Important Hormones of GIT

Knowing Important Hormones of GIT


Name of hormone

Site of production




G-cells of stomach

(i) secretion of HCl from stomach

(ii) trophic (growth promoting) action

on the gut



Upper small intestine

Stimulate production of bicarbonate in

Pancreatic juice



Upper small intestine

(i) stimulate pancreatic enzyme secretion

(ii) contraction of gall bladder



Upper small intestine

Inhibits; Gastrin, Secretin and VIP

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Hormonal Regulation of digestive secretions

Following hormones regulate the digestive secretions

  1. Gastrin; secreted by mucosa of pyloric region of stomach. It stimulates the gastric glands to release the gastric juice.

  2. Secretin; secreted by the mucosa of duodenum and jejunum. It causes the release of sodium bicarbonate in the pancreatic juice.

  3. Cholecystokinin pancreozymin (CCK-PZ); the word Cholecystokinin is derived from three terms: Chol (chole) means bile, cyst meaning bladder and kinin (Gr. Kinesis) meaning to rem

… (204 more words) …

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