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Nutrition
Ch 5
Term | Definition |
---|---|
lipids | fats |
satiety | feeling of satisfaction; fullness |
visible fats | fats in foods that are purchased and used as fats, such as butter or margarine |
invisible fats | fats that are not immediately noticeable such as those in egg yolk, cheese, cream, and salad dressings |
triglycerides | three fatty acids attached to a framework of glycerol |
glycerol | a component of fat; derived from a water-soluble carbohydrate |
fatty acids | a component of fat that determines the classification of the fat |
linoleic acid and linolenic acid | fatty acid essential for humans; cannot be synthesized by the body |
saturated fats | fats whose carbon atoms contain all of the hydrogen atoms they can; considered a contributory factor in atherosclerosis |
monounsaturated fats | fats that are neither saturated nor polyunsaturated and are thought to play little part in atherosclerosis |
polyunsaturated fats | fats whose carbon atoms contain only limited amounts of hydrogen |
omega-3 fatty acids | helps lower the risk of heart disease |
trans-fatty acids (TFA's) | produced by adding hydrogen atoms to a liquid fat, making it solid. |
hydrogenation | the combining of fat with hydrogen, thereby making it a saturated fat and solid at room temperature |
cholesterol | fatlike substance that is a constituent of body cells; is synthesized in the liver; also available in animal foods |
hypercholesterolemia | unusually high levels of cholesterol in blood; also known as high serum cholesterol |
plaque | fatty deposit on interior of artery walls |
lipoproteins | carriers of fat in the blood |
chylomicrons | the largest lipoprotein; transport the lipids after digestion into the body |
very low density lipoproteins (VLDLs) | lipoproteins made by the liver to transport lipids throughout the body |
low density lipoproteins (LDLs) | carry blood cholesterol to the cells |
high-density lipoproteins (HDLs) | lipoproteins that carry cholesterol from cells to the liver for eventual excretion |
lecithin | fatty substance found in plant and animal foods, a natural emulsifier that helps transport fats in the bloodstream; used commercially to make food products smooth |
Each gram of fat contains how many calories? | 9 |
Plant food sources for fats? | oils and margarine, nuts, avocados, coconut |
Monounsaturated fats should be what percent of total daily calories? | 20 |
Major sources of trans fatty acids? | baked goods, restaurant foods |
essential for synthesis of bile, sex hormones, cortisone, and vitamin D | cholesterol |
do not exceed daily cholesterol intake of how many milligrams? | 300 |
chemical digestion of fats occurs mainly in? | small intestine |
What emulsifies fats? | Bile |
Protein combines with final products of fat digestion to form ? | lipoproteins |
Increase HDLs by: | exercising, maintaining desirable weight, giving up smoking |
Deficiency symptoms occur when fats provide less than ? percent of total daily calories | 10 |