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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