hormonal control of digestion
DESCRIPTION
Hormonal Control of Digestion. Gastrin = hormone produced by gastric glands in lower stomach wall. Triggered by entry of food into the stomach -> and the stretching of the stomach. Gastrin +. Gastrin. Secreted from the stomach mucosa (lining) Enters the bloodstream, back to stomach - PowerPoint PPT PresentationTRANSCRIPT
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Hormonal Control of Hormonal Control of DigestionDigestion
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Gastrin = hormone produced by stomach.
Gastrin +Gastrin +
• Triggered by entry of food into the stomach, and the stretching of the stomach
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Gastrin
Gastrin +Gastrin +
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Gastrin
Gastrin +Gastrin +
• Promotes the release of HCl &, stomach churning
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Cross section of the stomach
these are the folds
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Cross section of the stomach
these are the folds
![Page 9: Hormonal Control of Digestion](https://reader033.vdocuments.us/reader033/viewer/2022051117/56815985550346895dc6c3ca/html5/thumbnails/9.jpg)
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Cross section of the stomach
these are the folds
![Page 12: Hormonal Control of Digestion](https://reader033.vdocuments.us/reader033/viewer/2022051117/56815985550346895dc6c3ca/html5/thumbnails/12.jpg)
Cross section of the stomach
these are the folds
![Page 13: Hormonal Control of Digestion](https://reader033.vdocuments.us/reader033/viewer/2022051117/56815985550346895dc6c3ca/html5/thumbnails/13.jpg)
Secretin = hormone produced in cells of the small
intestine• Triggered by HCl
acid in the chyme• enters bloodstream
and stimulates pancreatic cells.
• Response = Output of sodium bicarbonate buffer.
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• ALSO, stimulates the liver to produce bile
• BILE = emulsifies FAT
Secretin = hormone produced in cells of the small
intestine
First hormone discovered
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• Triggered by partially digested protein & fat that
enters the sm. intestine
CCK = hormone produced in cells of the small
intestine
CCK
CCK
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• Stimulates Gallbladder contraction to release bile
• Stimulates Pancreas to release enzymes
• Reduces appetite
CCK = hormone produced in cells of the small
intestine
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Enterogastrone
• Hormone produced in small
intestine• Triggered by acid - rich chyme filled with
lipids.• Target cells in the stomach and blocks
gastrin• Slows digestion b/c
digestion of fats takes more time
Entero-Entero-gastrone -gastrone -
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Enterogastrone
Entero-Entero-gastrone -gastrone -
• Inhibits peristalsis and acid secretion of the stomach
• Slows digestion in the stomach.