Tidal Breathing Decreases the Efficiency of Gas Exchange in Organisms

question 225

Multiple Choice

Tidal breathing decreases the efficiency of gas exchange in organisms such as mammals for a number of reasons.Which is not one of those reasons?

• A) The absence of countercurrent gas exchange
• B) The existence of dead space in the airways
• C) The residual volume of the lungs
• D) A short diffusion path length
• E) The limit in the O₂ concentration gradient between air and blood

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