Lipids are absorbed after lipase action, forming micelles with bile salts, then diffusing into epithelial cells where they reform triglycerides, are packaged into chylomicrons, and exocytosed into lacteals.
- lipases in the small intestine hydrolyse lipids into fatty acids and monoglycerides - associate with bile salts to form micelles - micelles move to epithileal cell surface - bile salts break away - fatty acids and monoglycerides simply diffuse across epithileal cell membrane - reform triglycerides in the cell - golgi body modifies triglyceride and combines it with protein to form chylomicron - vesicle containing chylomicron fuses with cell membrane - chlyomicron released by exocytosis as it is too large to diffuse across cell membrane - chylomicron diffuses into lacteal
| Front | How are lipids absorbed? |
|---|---|
| Back | - lipases in the small intestine hydrolyse lipids into fatty acids and monoglycerides - associate with bile salts to form micelles - micelles move to epithileal cell surface - bile salts break away - fatty acids and monoglycerides simply diffuse across epithileal cell membrane - reform triglycerides in the cell - golgi body modifies triglyceride and combines it with protein to form chylomicron - vesicle containing chylomicron fuses with cell membrane - chlyomicron released by exocytosis as it is too large to diffuse across cell membrane - chylomicron diffuses into lacteal |
Tags: digestion, enzymes, lipids
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