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

question 78

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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