The Movement of Oxygen from the Alveoli to the Blood

question 83

Multiple Choice

The movement of oxygen from the alveoli to the blood in the pulmonary capillaries depends on:

• A) facilitated transport by way of the hemoglobin molecule.
• B) active transport of oxygen from an area of lower concentration to an area of higher concentration.
• C) diffusion of oxygen from an area of higher concentration to an area of lower concentration.
• D) osmosis of the H₂O molecule across the respiratory membrane, where oxygen dissociates from hydrogen.

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