A member asked:

How could ph remain constant in blood?

A doctor has provided 1 answer

Closely regulated: The principal factor telling you brain how deeply and frequently to breathe is the pH of your blood, which you adjust from second to second by breathing more or less hard to get rid of more or less carbon dioxide, which is your major acid in the blood (in equilibrium with carbonic acid.) The kidneys manage it long-term.

Answered 7/11/2014

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