Homeostasis, Co-ordination & Response
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What you'll learn
How the body keeps its internal environment steady using negative feedback, temperature and blood glucose regulation, the nervous system, the reflex arc, and the pupil reflex.
- Homeostasis means keeping the internal environment constant
- Negative feedback corrects a change by opposing it
- The stimulus is not the same thing as the corrective response
- Body temperature is regulated using skin receptors and the hypothalamus
- Hormones are chemical messengers carried in the blood
- Insulin and glucagon regulate blood glucose in opposite directions
- The nervous system co-ordinates the body using electrical impulses
- The reflex arc: a fixed, automatic, fast pathway
- The pupil reflex adjusts how much light enters the eye