Question

What system maintains the `ph` of human blood at 7.4?

Answer 1

Basically a mixture of Acid/Base Buffers...

Explanation:

There's the `H_2CO_3` / `HCO_3^-` buffer mixture,
the more intricate Phosphate buffer system

OrthoPhosphate:
`H_3PO_4` / `H_2PO_4^-` /`(HPO_4) ^2-`

PyroPhosphate:
`H_4P_2O_7`. Work out the ions for yourself.......

Thirdly, there is the Protein Buffer system (e.g. HSA, Human Serum Albumin).

These three are the most important in the Homeostatic regulation..