If blood vessels lie close to the surface of the skin then heat can radiate from them into the air around us. This is why we appear red on a hot day/after exercise.
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What's Vasoconstriction?
In cold environments these blood vessels constrict, meaning they carry less blood to the surface of the skin therefore we lose less via radiation to the surroundings. This is why we appear pale on a cold day.
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Where is the body temperature is detected in the brain?
Hypothalamus
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What is the breakdown of glycogen to release glucose, called?
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