Homeostasis - The process of maintaining a constant internal environment despite external changes, Control centre - Hypothalamus, When you are too cold - Skin hair stands up, shivering, blood flow decreases (vasoconstriction), When you are too hot - Sweating, blood flow increases (vasodilation), Insulin - Stimulates liver and muscles to uptake glucose, Glucagon - Stimulates the liver to breakdown glycogen to release glucose, Pancreas - Regulates the blood glucose levels, Kidneys - Regulate water levels in your body,

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