Answer:
Buffer systems
Explanation:
Living organisms maintain constant pH of both extracellular and intracellular fluids. The human body also maintains the pH of blood within the narrow range of 7.35 to 7.45. This is achieved with the help of buffer systems. Buffers are the chemicals that convert the strong acids or bases into their weak counterparts by removal or addition of protons.
For example, carbonic acid–bicarbonate buffer system of the human body wherein the bicarbonate ions serve as weak bases while the carbonic acid serves as a weak acid.
Under the conditions of higher H+ concentrations, the bicarbonate ion of the buffer system serves as a weak base and accepts the excess of the H+ to restore the normal range.
