FNH 350 Lecture Notes - Lecture 29: Indirect Calorimetry, Basal Metabolic Rate, Sensible Heat
29 Nov 2017
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Document Summary
Total energy expenditure= total amount of calories burnt (carbohydrate, fats, proteins, alcohol) into body out of body (basal metabolic rate, thermic effect of food, physical activity, thermic regulation) Energy can be lost in different forms: Indirect calorimetry measuring o2 consumption and co2 expiration. 1 kcal = amount of energy needed to increase the temperature of 1 kg of water from 15oc to. Metabolic processes in the body result in the production of heat energy expenditure can be quantified by measuring heat dissipated by the body. This method is replaced by indirect calorimetry. Measuring the consumption of oxygen the heat released by metabolic oxidation can be calculated indirectly as kcal. Measuring the expiration of co2 respiratory quotient (rq) is calculated: Carbohydrate and fat are the major fuel sources. Urinary nitrogen excretion can be measured to account for the contribution of protein oxidation to energy expenditure. Provide additional information about the fuel sources used in the body.
