NUTR 3210 Lecture 7: NUTR 7 - Lipids
18 Oct 2016
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Soluble in organic solvents (ie. ether, chloroform, acetone) Wide variety of structures and functions (10,000 different lipid species characterized) Source of energy (good storage bc they are non-polar and exclude water) Numbering starts from carboxyl end of fatty acid: 18:2 9,12. * vs. carbs can only store enough to last you a little. * cholesterol is precursor to vitd, estrogen and testosterone: effect inflammation and blood clotting (promotes or decrease, roles in disease development (atherosclerosis, diabetes, obesity) Actually modest effects on humans, can"t test fully bc unethical. Saturated = max # of h atoms, only single bonds. Unsaturated = missing h atoms, double bonds (monounsaturated, polyunsaturated) x. 1929, george and mildred barr fed rats diets that were completely fat free. = stunted growth, lost fur, inflamed and scaly tails. * in humans, resembled eczema (believed that not enough fas causes disease in humans) In 1963, infants fed diets that differed in fat content.
