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Unformatted text preview: Lecture 17 Part I indirect calorimetry: measure O2 concentration going in, CO2 going out > amount of O consuming--> used to calculate RQ to measure metabolic rate: knowing this tells us: what you use for energy (fat lower RQ, carb higher RQ)- amount of calories using- ATP production indirect calorimetry really measures amount of ATP producing (ATP Produced equivalent to ATP utilized)- double labeled water type of indirect calorimetry- isotopes of H and O measured presence- vial of water given with these isotopes (H2O non radioactive label)- H is lost in H2O, O is lost in H2O and CO- O2 isotope more rapidly lost because you lose it in TWO places- take O in, it equilibrates with all the O in body, and lose some of H in water- constantly losing water- Rate of O lost Rate of H lost = Total amount of CO2 expelled- if you know RQ also can measure metabolic rate- RQ can be estimated from FQ- after looking at a graph of Time vs. Amount of label left in body take difference b/w after looking at a graph of Time vs....
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This note was uploaded on 03/16/2010 for the course NS 1150 at Cornell University (Engineering School).