The Oxygen Needed for Respiration Moves from the Lungs and into Capillaries

question 79

Multiple Choice

The oxygen needed for respiration moves from the lungs and into capillaries by simple diffusion. Once in the capillaries, what molecule or other component of blood is responsible for transporting oxygen in the circulatory system?

• A)There is no transport molecule; oxygen remains free in the blood.
• B)white blood cells
• C)hemoglobin
• D)cadherins

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