Difference between revisions of "Gut Endocrine Function - Anatomy & Physiology"
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The Alimentary System secretes hormones which have various functions within the Gatrointestinal tract, liver, gall bladder and pancreas. | The Alimentary System secretes hormones which have various functions within the Gatrointestinal tract, liver, gall bladder and pancreas. | ||
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{| border="1" cellpadding="10" cellspacing="0" | {| border="1" cellpadding="10" cellspacing="0" | ||
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|<font color=red>Gastrin</font> | |<font color=red>Gastrin</font> | ||
|G-Cells in Stomach and duodenum | |G-Cells in Stomach and duodenum | ||
| − | |Stimulates Parietal cells in the stomach to secrete HCl and Chief cells to secrete pepsinogen. | + | |Stimulates Parietal cells in the [[Forestomach - Anatomy & Physiology|stomach]] to secrete HCl and Chief cells to secrete pepsinogen. |
|- | |- | ||
|<font color=red>Gastric Inhibitory Peptide</font> | |<font color=red>Gastric Inhibitory Peptide</font> | ||
|Duodenum and Jejunum | |Duodenum and Jejunum | ||
| − | |Inhibits gastric motility and HCl secretion in the stomach, induces insulin secretion. | + | |Inhibits gastric motility and HCl secretion in the [[Forestomach - Anatomy & Physiology|stomach]], induces insulin secretion. |
|- | |- | ||
|<font color=red>Ghrelin</font> | |<font color=red>Ghrelin</font> | ||
| − | |Stomach and Pancreas | + | |[[Forestomach - Anatomy & Physiology|Stomach]]and Pancreas |
|Increases food intake (by stimulating hunger) at the level of the hypothalamus | |Increases food intake (by stimulating hunger) at the level of the hypothalamus | ||
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|<font color=red>Somatostatin </font> | |<font color=red>Somatostatin </font> | ||
|Gastric glands of the stomach | |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. | + | |Inhibits release of gastrin and HCl from the [[Forestomach - Anatomy & Physiology|stomach]], inhibits secretin and cholecystokinin release from the duodenum and inhibits release of glucagon from the pancreas. |
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Revision as of 08:58, 3 July 2008
The Alimentary System secretes hormones which have various functions within the Gatrointestinal tract, liver, gall bladder and pancreas.
| 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 | Inhibits gastric motility and HCl secretion in the stomach, induces insulin secretion. |
| Ghrelin | Stomachand 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. |