I keep getting “Carbon dioxide transport” questions wrong in Breathing & Exchange of Gases. What's the trap?
thinking CO₂ is carried mainly by haemoglobin like oxygen.
The usual trap: thinking CO₂ is carried mainly by haemoglobin like oxygen. How to avoid it: CO₂ is mostly bicarbonate; only a fraction rides on haemoglobin. Go back to the definition — most CO₂ travels in the blood as bicarbonate ions.
Key point
Carbon dioxide transport
Common mistake
thinking CO₂ is carried mainly by haemoglobin like oxygen.
Memory tip
CO₂ is mostly bicarbonate; only a fraction rides on haemoglobin.
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