Taber’s Online
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(thĕr″mō-jen′ĕ-sĭs )
[ thermo- + genesis ]
The production of heat, esp. by mitochondria within cells.
The heat-producing response to ingesting food. For several hours after eating, the metabolic rate increases. Heat is a by-product of the digestion, absorption, and breakdown of consumed foods, and the synthesis and storage of proteins and fats. Because the calories used in the thermic response are expended, they are not stored as fat.
A limited physiological response of the newborn infant to chilling. Hypothermia stimulates sympathetic catabolism of brown fat, which is not coupled with ATP formation, and therefore releases most energy in the form of heat. Brown fat is located mainly in the neck and chest of the infant.
SEE: hypothermia
The energy cost to a cell or organism of consuming, digesting, and metabolizing ingested nutrients.
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