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← Nature & AnimalsWhich behavioral adjustment maximizes heat retention when a hibernating marmot's core temperature drops rapidly during late winter?
A)Synchronized shivering thermogenesis response
B)Peripheral vasoconstriction minimizing heat loss✓
C)Uninterrupted deep sleep to reduce metabolism
D)Increased vasodilation promoting blood flow
💡 Explanation
Rapid cooling triggers peripheral vasoconstriction, reducing blood circulation near the skin's surface, thereby minimizing heat loss through the skin because this is a mechanism of retaining heat by limiting radiation . Therefore vasoconstriction results instead of shivering, vasodilation or lowered metabolism, which expend further energy or release more heat.
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