Buffer in blood consists of

The most important buffer in the blood consist of :

The most important buffer in the blood consists of

The most important buffer in the blood consist of :

A buffer solution consists of 1 mole each of HA and its conjugate base A^(-) , Addition of which of the following decreases the pH of buffer ?

What is buffer capacity? Whenn does the buffer capacity of a buffer solution consisting of a weak acid and its salt become maximum?