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Unformatted text preview: Ch 8 • For each 3500 kcalories are eaten in excess, a pound of body fat is stored • Bomb calorimeter : measures the heat energy released when foods are burned, thus providing an estimate of the potential energy of the foods. Measures the available energy in foods but overstates the amount of energy that the human body derives from foods. • Physiological fuel value : number of kcalories that the body derives from a food, in contrast to number of kcalories determined by calorimetry • Food energy values can be determined by o Direct calorimetry : measures the amount of heat released o Indirect calorimetry : amount of oxygen consumed and CO 2 expelled • Appetite : refers to sensations of hunger, satiation, and satiety; influenced by sight, smell, thought, or taste of food; psychological response o Satiation : feeling of satisfaction during a meal; determines how much food is consumed; receptors in stomach increase, hormones CCK increase – person feels full and person stops eating; tells us to “stop eating” o Satiety : feeling of fullness after a meal and stop eating until the next meal;...
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- Fall '07
- Energy, Energy density, Basal Metabolic Rate, High fat foods