What Drives the Movement of Oxygen from the Alveoli into the Bloodstream

question 96

Multiple Choice

What drives the movement of oxygen from the alveoli into the bloodstream?

• A) active transport against a concentration gradient
• B) facilitated diffusion down a concentration gradient
• C) facilitated diffusion against a concentration gradient
• D) diffusion down a concentration gradient
• E) the heart pumping the oxygen into the bloodstream

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