Which physiological effect results when a hibernating marmot experiences sudden environmental warming above freezing?

💡 Explanation

When a marmot warms prematurely, its body initiates vasodilation to dissipate heat into environment via increased blood flow causing the peripheral blood vessels to expand, leading to rapid rewarming and increased heart rate. Therefore increased heart rate results, rather than torpor, vasoconstriction or fat storage which are associated with maintaining hibernation.

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