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← Nature & AnimalsWhich outcome occurs when reindeer calves experience vasodilation during sub-zero temperatures?
A)Increased heat loss to environment✓
B)Enhanced insulation of extremities
C)Reduced brown fat metabolism rate
D)Decreased shivering energy expenditure
💡 Explanation
Increased blood flow near the skin surface during vasodilation transfers core heat to the periphery, because heat is readily dissipated in cold conditions; therefore, shivering may increase, rather than be bypassed, to maintain core temperature homeostasis.
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