Explain (HT only) how vasodilation and sweating help lower body temperature.

In the subtopic Control of body temperature (biology only), this learning objective focuses on explain (HT only) how vasodilation and sweating help lower body temperature. Within The human nervous system, students should explain this idea in the exact curriculum context rather than as an isolated fact. Approved keywords for this objective include body temperature, HT only, sweating, and vasodilation. vasodilation means the widening of blood vessels, which increases blood flow to the skin and helps to dissipate heat when body temperature is too high. Avoid students often confuse vasodilation with vasoconstriction, thinking both processes lower body temperature; instead remember that vasodilation involves the widening of blood vessels, which increases blood flow to the skin, allowing heat to escape and thus lowering body temperature. For exam answers, clearly explain how vasodilation increases blood flow to the skin and how sweating cools the body through evaporation.