* * *
acid-base balance .as-əd-.bās- n the state of equilibrium between proton donors and proton acceptors in the buffering system of the blood that is maintained at approximately pH 7.35 to 7.45 under normal conditions in arterial blood
* * *
the balance between the amount of carbonic acid and bicarbonate in the blood, which must be maintained at a constant ratio of 1:20 in order to keep the hydrogen ion concentration of the plasma at a constant value (pH 7.4). Any alteration in this ratio will disturb the acid-base balance of the blood and tissues and cause either acidosis or alkalosis. The lungs and the kidneys play an important role in the regulation of the acid-base balance.
* * *
a condition in which the net rate of acid or alkali production by the body is balanced by the net rate of acid or alkali excretion from the body, resulting in a stable concentration of H+ (hydrogen ions) in the body fluids.Medical dictionary. 2011.