Biology / Unit 12 Bio 2758 short lesson, about 20 seconds
Thermoregulatory Responses: Insulation, Vasodilation, Vasoconstriction, Behavior
Captions available
The idea
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.
In practice
Vasodilation moves blood toward the skin for evaporative cooling; vasoconstriction moves it toward the core to conserve heat.
Where people slip
Shivering and countercurrent heat exchange are active regulatory mechanisms, not passive side effects of activity.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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