Answer:
C. phosphate buffer system
Explanation:
A buffer is either a solution of a weak acid and its conjugate base (acid buffer) or a solution of a weak base and its conjugate acid (base buffer). The function of a buffer is to essentially resist the change in pH upon addition of and acid (or a base).
There are 3 buffer systems that are present in the human body:
-Phosphate buffer
-Bicarbonate buffer
-Protein buffer
The correction option is therefore:
Phosphate buffer system which is an acid buffer involving the dihydrogen phosphate ion H₂PO₄⁻ which a weak acid and hydrogen phosphate HPO₄²⁻ which is the conjugate base. The function of the phosphate buffer is to help maintain the pH of cells in the human body.
