C12 - HOMEOSTASIS IN ACTION - 12.1 - CONTROLLING BODY TEMPERATURE. 0.0 / 5 ? BiologyHomeostasisGCSEAQA Created by: ellieg900Created on: 30-11-18 22:28 What is the optimum temperature for the human body? 37 degrees. 1 of 11 What does a high and low body temperature mean for the bodies enzymes? Low- slow breakdown / High- enzymes are denatured. 2 of 11 Where is the thermoregulatory system? In the brain. 3 of 11 How does the thermoregulatory work? The temperature change of the blood passing through the brain, is very easily detected as it can notice differences of half a degree. 4 of 11 What happens to your bodies veins when hot? Vasodilation. 5 of 11 What is vasodilation? Capillaries dilate allowing more blood flow and your skin becomes flushed, then more heat energy is lost through radiation. 6 of 11 What does your body do when it is to hot to remain at a constant temperature. Sweat cools you down and evaporates, transferring energy to the surroundings. 7 of 11 What is important to replace after exercise because of sweat? Water and mineral ions. 8 of 11 How does your body keep warm? Vasoconstriction. 9 of 11 Is sweat produced when you are cold? No. 10 of 11 What does your skeletal system do when you are cold? Bones continually contract and relax makes you shiver which is and exothermic reaction. 11 of 11
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