Control of ____ inside the body so that they are at the correct level for cells and organs to function properly is known as ____. Specialised nerve cells called ____ may often be the first stage in homeostasis, as they ____ a change in conditions. Impulses from these receptors will travel along ____ neurones to the ____ nervous system, from which impulses will then be sent along ____ neurones to ____. In many cases these effectors are ____, which produce a hormone to ____ the change that has been detected. Once the change has been corrected and conditions brought back to ____, the levels of this hormone will decrease. This is known as negative ____.

Why does control matter?

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