Biology > CASE STUDY > (F/W)Chapter 6-Body Composition-Guide Questions With Complete Solution (All)

(F/W)Chapter 6-Body Composition-Guide Questions With Complete Solution

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Describe body composition, including the concepts of essential fat, overweight, and obesity. - ANSWERThe human body can be divided into fat-free mass and body fat. Fat-free mass is composed of all the ... body's nonfat tissues. A certain amount of body fat is necessary for the body to function. Fat is incorporated into the nerves, brain, heart, lungs, liver, mammary glands, and other body organs and tissues. It is the main source of stored energy in the body; it also cushions body organs and helps regulate body temperature. This essential fat makes up about 3-5% of total body weight in men and about 8-12% in women. The primary source of excess body fat is excess calories consumed in the diet. A pound of fat is equal to 3500 calories, so an intake of just 100 calories a day in excess of calories expended will result in a 10-pound weight gain over the course of a years. CONTINUES.... [Show More]

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