Gastrointestinal physiology

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Gastrointestinal physiology

Stomach:
Gastric secretion:
• hydrogen ions are secreted in response to activity of hydrogen-potassium ATPase
• sterilises upper gastrointestinal tract

Gastrin and somatostatin:
hormones

Small intestine:
Functions:
digestion
absorption
protection against toxins

Pancreas:
exocrine gland
inactive proenzymes are secreted  activated by trypsin

Colon:
absorbs water and electrolytes

Control of gastrointestinal function:
Autonomic control:

Gut hormones:

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