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About what fraction of the calories a person burns in a day go toward sustaining basic body functions included in the basal metabolic rate?
AAbout 10%
BAbout 25%
CAbout 50%
DAbout 75%
Answer & Solution
Correct answer: D. About 75%
1. The basal metabolic rate accounts for the energy needed to sustain basic body functions even without any deliberate physical activity.
2. About 75% of the calories a person burns in a day go into these basic functions alone.
3. That leaves only about a quarter of daily calorie burn for movement and other voluntary activity.
4. 10%, 25%, and 50% are each well below the stated 75% figure for how much of daily energy use is devoted to basic functions.
_Source: OpenStax College Physics (CC BY 4.0), Ch 7 "Work, Energy, and Energy Resources", section 7.8 Work, Energy, and Power in Humans_
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