Name: Laura P.
Date: December 2002
What is the pH of blood? What substances keep the pH of
the blood constant?
Normal pH is about 7.35. There are a series of buffers which help the
plasma resist any change in pH. Some of them include: the hemoglobin in the
red blood cells, other plasma proteins, the bicarbonate buffer and the
Peter Faletra Ph.D.
Office of Science
Department of Energy
The pH of the blood (or any solution is: pH= -log(H+) a measure of how
acidic or basic the blood is. Many physiological processes influence the pH,
but one of the largest contributors is the CO2 content of the blood. CO2 +
H2O = HCO3(-1) + H(+1)
Click here to return to the Molecular Biology Archives
Update: June 2012