The oxygen content of water increases linearly with an increase in oxygen partial pressure,while the oxygen content of blood increases in a sigmoidal (S-shaped)fashion.Why?
A)Carbonic anhydrase contributes to CO₂ release in blood,but not water.
B)The Bohr shift is stronger in water than in blood.
C)Hemoglobin shows cooperative oxygen binding.
D)All of the above answers apply.

Question

Quizplus · Accepted Answer

Hemoglobin exhibits cooperative oxygen binding, meaning that once one oxygen molecule binds to hemoglobin, the affinity for additional oxygen molecules increases. This results in a sigmoidal oxygen saturation curve for blood rather than a linear relationship like water. Carbonic anhydrase and the Bohr effect do play a role in oxygen transport in blood, but they do not explain the difference in oxygen content between water and blood.

The Oxygen Content of Water Increases Linearly with an Increase