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← Nature & AnimalsWhich effect facilitates heat dissipation when a mammal's core temperature rises above homeostatic levels?
A)Increased metabolic rate through shivering
B)Peripheral vasodilation increasing skin perfusion✓
C)Reduced cutaneous blood flow conserving heat
D)Activation of brown adipose tissue thermogenesis
💡 Explanation
When body temperature rises, peripheral vasodilation occurs because the nervous system signals blood vessels near the skin surface to widen, increasing blood flow to the skin. The increased perfusion facilitates heat transfer to the environment. Therefore increased skin perfusion results, rather than conserving heat, increasing metabolism, or BAT activation which serve heat generation purposes.
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