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CAIE A-Level Biology 8.2.3 Plasma and Carbon Dioxide Transport

Practise distinguishing plasma transport mainly as HCO₃⁻ plus some dissolved CO₂ from carbaminohaemoglobin formation and carbonic-anhydrase activity inside red cells.

Syllabus
2028–2030
Course
Biology 9700
Level
AS

Exam points

  • identify hydrogencarbonate ions as the main carbon-dioxide-derived form in plasma
  • recognise that a smaller fraction of carbon dioxide travels dissolved in plasma
  • separate plasma transport from carbaminohaemoglobin formation inside red blood cells

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