The measurement of oxygen consumption during exercise can provide an estimate of metabolic rate. The rationale behind the use of oxygen consumption to estimate metabolic rate is
A. that measurement of oxygen consumption provides a direct estimate of how much fat is used a fuel source.
B. that measurement of oxygen consumption provides a direct estimate of how much carbohydrate is used a fuel source.
C. that a direct relationship exists between oxygen consumed and the amount of heat produced in the body.
D. None of these answers is correct
Answer: C
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