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Negative Feedback, Thyroxine, Adrenaline (Adrenaline (Pupils of your eyes…
Negative Feedback, Thyroxine, Adrenaline
Adrenaline
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If you need to be ready for action your adrenal glands located at the top of your kidneys secrete adrenaline which causes:
Adrenaline boosts the delivery of oxygen to your brain and muscles preparing for fight or flight response. Once danger is over raised levels of awareness are no longer needed so the levels get restored back to resting levels
Thyroxine
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Eg how quickly substance broken down and built up, how much oxygen tissues use, development of brain for child
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This is because of negative feedback control involving pituitary gland and the hormone it produces which stimulates thyroid
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Negative Feedback
Your body uses negative feedback systems to control the levels of hormones and other substances in the blood
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When the body detects the level of a substance has gone above or below the normal level it triggers a response