The Diffusing Capacity of the Lungs for CO₂ Is Much

question 11

Multiple Choice

The diffusing capacity of the lungs for CO₂ is much higher than the diffusing capacity for O₂ because

• A) The diffusion coefficient for CO₂ is so much higher than that of O₂
• B) The area available for CO₂ is greater because it can go through lipid membranes
• C) CO₂ dissolves in water much better
• D) The gradient for CO₂ diffusion is less
• E) Capillaries open up to make the diffusing capacity greater

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