Physical change
A physical change is when you change the form of matter but can reverse it.
Dictionary > Physical change
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Homeostasis is essential to maintain conditions within the tolerable limits. Otherwise, the body will fail to function properly. The body does this through feedback control mechanisms, e.g. blood sugar level regulation and temperature regulation. Read this tutorial to know more about the principles of negative feedback control employed by the body to sustain homeostasis...
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Osmoregulation is the regulation of water concentrations in the bloodstream, effectively controlling the amount of water available for cells to absorb. Take a look at this tutorial to know how the body regulates blood sugar levels and temperature...
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