Most carbon dioxide is transported in the blood as

  1. hydrogencarbonate ions in plasma
  2. carbaminohaemoglobin
  3. oxyhaemoglobin
  4. dissolved CO₂
Answer

A) hydrogencarbonate ions in plasma

About 85% as HCO₃⁻. AS & A Level Biology · Topic 8 Transport in Mammals · 8.2 Transport of oxygen and carbon dioxide

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