Select a structural characteristic of an RBC that contributes to its gas transport function.
a. The cytoplasm contains albumin, the molecule that binds to and transports respiratory gases.
b. The presence of many mitochondria generates ATP to power efficient oxygen transport.
c. The biconcave shape provides a greater surface area relative to the cell volume.
d. The multilobed nucleus permits the cell to deform in order to pass through narrow capillaries.