Which risk significantly increases if a hibernating mammal experiences sudden environmental warming during early winter?

💡 Explanation

When sudden warming occurs, premature arousal happens as internal temperature regulation mechanisms (e.g., uncoupling protein-1 in brown fat) trigger a return to normal metabolic activity, burning crucial energy reserves that needed to survive through the remaining winter. Therefore, depletion occurs, as opposed to alternative outcomes which are contingent different physiological challenges/conditions.

• Which risk increases when cutaneous vasoconstriction limits blood flow in arctic mammals during prolonged shivering?
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