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Body Size and Heat Exchange
Grade Level
AP Biology
APB.126 Body Size and Heat Exchange
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A student claims that a larger organism exchanges heat more slowly because it has more cells, not because of surface area-to-volume ratio. Which explanation is most accurate?
A
The number of cells is the only factor that determines heat exchange, so surface area is irrelevant.
B
The number of cells contributes to volume and heat storage, while heat exchange occurs across surface, so the surface area-to-volume ratio is the relevant geometric predictor.
C
Larger organisms exchange heat more slowly because each cell has no membrane surface.
D
Surface area-to-volume ratio applies only to individual cells and never to whole organisms.
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