Which physiological benefit allows arctic foxes to survive extreme cold, related to vasodilation?

💡 Explanation

When exposed to extreme cold, arctic foxes utilize countercurrent heat exchange via specialized vasodilation and vasoconstriction, which transfers heat from outgoing arterial blood to incoming venous blood, minimizing heat loss through extremities. Therefore, minimized heat loss results, rather than increased metabolic rate, decreased shivering or enhanced sweating, which would be less effective in arctic conditions.

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