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Gut Endocrine Function - Anatomy & Physiology (view source)
Revision as of 08:54, 3 July 2008
, 08:54, 3 July 2008no edit summary
<big><center>[[Endocrine System - Anatomy & Physiology|'''BACK TO ENDOCRINE SYSTEM ANATOMY & PHYSIOLOGY''']]</center></big>
<big><center>[[Endocrine System - Anatomy & Physiology|'''BACK TO ENDOCRINE SYSTEM ANATOMY & PHYSIOLOGY''']]</center></big>
The Alimentary System secretes hormones which have various functions within the Gatrointestinal tract, liver, gall bladder and pancreas.
{| border="1" cellpadding="10" cellspacing="0"
!Hormone
!Site of Secretion within GIT
!Action
|-
|Cholecystokinin
|Duodenum
|Stimulates digestion of fat and protein by causing release of digestive enzymes and bile from the pancreas and gall bladder.
|-
|Gastrin
|G-Cells in Stomach and duodenum
|Stimulates Parietal cells in the stomach to secrete HCl and Chief cells to secrete pepsinogen.
|-
|Gastric Inhibitory Peptide
|Duodenum and Jejunum
|Induces insulin secretion
|-
|Ghrelin
|Stomach and Pancreas
|Increases food intake (by stimulating hunger) at the level of the hypothalamus
|-
|Secretin
|Crypts of Leiberkuhn in the Duodenum
|Causes secretion of bicarbonate to buffer the pH of the chyme entering the small intestine. Also triggers insulin release.
|-
|Somatostatin
|Gastric glands of the stomach
|Inhibits release of gastrin and HCl from the stomach, inhibits secretin and cholecystokinin release from the duodenum and inhibits release of glucagon from the pancreas.
|}