Homeostasis in mammals involves physiological control systems that maintain the internal environment within restricted limits. The importance of maintaining a constant core temperature and constant blood pH in relation to enzyme activity. The importance of maintaining a constant blood glucose concentration in terms of energy transfer and water potential of blood.

Homeostasis is the control of internal conditions.

It makes sure that the cells in the body are functioning efficiently.

It does this by bringing conditions, for example temperature, PH and concentration of ions, back to a suitable level.

If the conditions were not controlled some processes would be disturbed for example proteins could denature and stop functioning or osmosis could cause cells to burst.

Having these things internally controlled means that an organism can live different environments and still function properly.

If blood glucose levels are too low there is not enough to respire sufficiently and supply cells with energy, if it is too high it decreases the water potential in the blood meaning water moves out of cells.