The partial pressures (in mm Hg) of oxygen (O2) and carbon dioxide (CO2) at alveoli (the site of diffusion) are

pO 2 = 40 mmHg and pCO 2 = 45 mmHg

pO 2 = 40 mmHg and pCO 2 = 45 mmHg

pO 2 = 104 mmHg and pCO 2 = 40 mmHg

pO 2 = 40 mmHg and pCO 2 = 45 mmHg

pO 2 = 159 mmHg and pCO 2 =0.3 mmHg

pO 2 = 95 mmHg and pCO 2 =40 mmHg

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The partial pressures (in mm Hg) of oxygen (O₂) and carbon dioxide (CO₂) at alveoli (the site of diffusion) are

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pO₂ = 104 mmHg and pCO₂ = 40 mmHg

pO₂ = 40 mmHg and pCO₂ = 45 mmHg

pO₂ = 159 mmHg and pCO₂ =0.3 mmHg

pO₂ = 95 mmHg and pCO₂ =40 mmHg

answer is B.

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The partial pressures (in mm Hg) of oxygen (O₂) and carbon dioxide (CO₂) at alveoli (the site of diffusion) are pO₂ = 104 mmHg and pCO₂ = 40 mmHg.

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