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Nature & Animals

Which effect promotes the dissipation of heat when environmental temperature rises in endotherms?

A)Peripheral vasodilation and conductive heat loss
B)Increased shivering thermogenesis efficiency
C)Upregulation of uncoupling protein 1
D)Enhanced countercurrent heat exchange efficiency

💡 Explanation

When external temperature increases, peripheral vasodilation occurs, increasing blood flow to the skin and stimulating conductive heat loss because this is how heat radiates into cooler environments; therefore, the animal cools its core, rather than upregulating other thermogenic processes.

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