The thermoregulatory centre is the part of the brain that monitors and controls body temperature.
Human enzymes wok best at 37 degrees C so the body's temperature needs to be controlled. The thermoregulatory centre gathers information as nerve impulses from temperature receptors in the brain (sensitive to the blood flow there) and the skin (sensitive to skin temperature)
If the core temperature gets too hot sweat glands release more sweat.This evaporates, removing heat energy from the skin. Superficial blood capillaries dilate - allowing moreblood to flow through the skin, and more heat to be lost.
If the core temperature gets too cold muscles contract rapidly (shivering). These contractions require energy from respiration, and some of this released as heat. Superficial blood capillaries constrict letting less heat blood flow through the skin and conserving heat in the body. The hairs on the skin rise, trapping a layer of air near the skin, which helps to insulate the skin against heat loss.
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