HTHSCI 2H03 Lecture Notes - Lecture 17: Glycerol, Phospholipid, Bloating
2 May 2016
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Triglycerides: structure: composed of glycerol + three fatty acids, function: is the storage form of fat in the body (accounts for. Phospholipids: structure: composed of a glycerol backbone (blue), + two fatty acids + phosphate + variable head group (pink x, function: essential for the formation of cell membranes. Consuming excess amounts of cholesterol in the diet can lead to problems. Lipids are not soluble in the plasma; therefore, to be transported in the blood they must be packaged with a protein carrier (the apoprotein). There are three types of lipoproteins characterized by their composition and density. Very low-density lipoprotein (vldl: composed of 55-65% triglyceride; 15-20% phospholipid, 10-15% cholesterol, and 5-10% protein, is the primary carrier of triglycerides from the liver to the periphery (mainly adipose, after it deposits tgs and ffa, it becomes ldl. High-density lipoprotein (hdl: composed of 5% triglyceride; 30% phospholipid; 20% cholesterol, and 45-50% protein, transports cholesterol from tissues back to the liver (reverse cholesterol transport).
