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Lipids - (chapter 5)
contain more than twice the calories per gram (9 kcal) as proteins and carbohydrates. (163)
should comprise 20% to 35% of adult's calorie intake. (163)
major killer disease in North America. (191)
most common type of lipid found in the body and in foods. (165)
include fatty acids, triglycerides, phospholipids, sterols and cholesterols. (do not dissolve readily in water) (163)
simplest form of lipids; long chain of carbons bonded with hydrogens. (165)
class of lipid built on backbone of glycerol, fatty acid replaced with phosphorus or nitrogen. (166)
(example of phospholipid and emulsifier) participate in fat digestion in small intestine; contains a part that attracts and repels water. (166)
(sterol) used to form certain hormones and bile acids and is incorporated in to cell structures. (Body can make all cholesterol, triglycerides, and phospholipids it needs.) (167,186)
Animal fats are the chief contibutors of saturated fatty acids to North American diet. (170)
ability to keep mixture of lipids and water from separating. (phospholipids; monoglycerides, lechithin and bile acids) (170, 186)
only found in animal foods. (170)
5 types: water, starch derivatives, fibers, protein -derived, engineered fats (173)
vehicles for transport of lipids from the small intestine and liver to body tissues. (178)
4 groups: chylomicrons, VLDL, LDL, HDL (179)
takes up various lipids from the blood and is manufacturing site for lipids and cholesterol. (180)
transports cholesterol to tissues. (181)
donates the cholesterol primarily to other lipoproteins for transport back to the liver to be excreted.
used for energy storage, insulation, and transportation of fat-soluble vitamins. (184)
decreases blood clotting and inflammatory processes in body. (165,182)
3-carbon backbone in all triglycerides. (163)
arise from intestinal cells. (179)
increases shelf life, makes it harder, more saturated, reduces tendency for oxidative breakdown. (adds hydrogen to unsaturated fat, changing fat to trans fat) (174)
high blood LDL, hypertension, diabetes, obesity, smoking. (191)
made from cholesterol. (186)
North American diet consists of 33% of calories of fat.
typical signs are dizziness, sweating, and irregular heartbeat. (191)
has less effect on blood cholesterol than saturated fat.
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