Most oxygen is transported in the blood bonded to:
A)iron in the plasma
B)red blood cell (RBC)membranes
C)hemoglobin in the plasma
D)hemoglobin in the RBCs

Question

Quizplus · Accepted Answer

Hemoglobin in the RBCs is the main molecule that binds with oxygen and is responsible for oxygen transportation in the blood. This is because hemoglobin has a high affinity for oxygen and can bind with up to 4 oxygen molecules. Iron in the plasma does not bond with oxygen, and red blood cell membranes do not directly participate in oxygen transportation. While hemoglobin can also be found in the plasma, the majority of it is found in RBCs.

Most Oxygen Is Transported in the Blood Bonded To