Digestion and Absorption of Lipids
Human Nutrition 3(3+0)
Digestion and Absorption of Lipids
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Reactions in intestinal lumen
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Reactions within intestinal wall
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Mode of entry into circulation
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a)Fat (Triglyceride) 3-10% absorbed Lipase as micelle
Diglycerides + fatty acids 3-10% absorbed Lipase as micelle
Monoglycerides + fatty acids 60-68% absorbed Lipase as micelle
Glyerol + fatty acids 20% absorbed Phospholipids as micelle Phospholipids
Glycerol + fatty acids + phosphoric acid + organic base
(choline etc.) Absorption b) Cholesterol esters Cholesterol esterase Absorption Cholesterol + fatty acids
c) Short chain fatty acids (C4 — C10 ) Absorption
d) Glycerol Absorption
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Triglycerides and diglyerides are hydrolysed by intestinal lipase into monoglycerides and fatty acids.
Resynthesis of neutral fat, phospholipids and formation of chylomicrons
Short chain fatty acids (C4 —C10 )
Glycerol
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a)Through lymphatic vessels (lacteals)
b)Triglycerides, cholesterol and Phospholipids in the form of chylomicrons
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Through portal blood
a)Short chain fatty acids (C4-C10)
b)Glycerol
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Last modified: Tuesday, 7 February 2012, 6:31 AM