Biology / Bio 2758 · Atom · ~20 seconds
Thermoregulatory Responses: Insulation, Vasodilation, Vasoconstriction, Behavior
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An animal regulates heat exchange, per Bio 2757, through insulation, vasodilation and vasoconstriction shifting blood toward or away from the skin, and behavior like basking or seeking shade.
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Vasodilation moves blood toward the skin for evaporative cooling; vasoconstriction moves it toward the core to conserve heat.
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Shivering and countercurrent heat exchange are active regulatory mechanisms, not passive side effects of activity.