Bohr effect is described as:

Bohr effect is described as:
September 2009
a) Decrease in CO2 affinity of hemoglobin when the pH of blood
rises
b) Decrease in CO2 affinity of hemoglobin when the pH of blood
falls
c) Decrease in O2 affinity of hemoglobin when the pH of blood
rises
d) Decrease in O2 affinity of hemoglobin when the pH of blood
falls
Correct Answer - D
Ans. D: Decrease in O2 affinity of hemoglobin when the pH of blood
falls
The decrease in O2 affinity of hemoglobin when the pH of blood falls
is called the Bohr effect and is closely related to the fact that
deoxygenated hemoglobin (deoxyhemoglobin) binds H+ more
actively than does oxyhemoglobin. The pH of blood falls as its CO,
content increases, so that when the PCO2 rises, the curve shifts to
the right and the P5„ rises.