Biology 0610 · IGCSE · Gas exchange in humans

Gas exchange in humans — practice question

How does expired air differ in composition from inspired air?

  • Acarbon dioxide decreased; oxygen increased; water vapour increased
  • Bcarbon dioxide decreased; oxygen decreased; water vapour increased
  • Ccarbon dioxide increased; oxygen decreased; water vapour decreased
  • Dcarbon dioxide increased; oxygen decreased; water vapour increased

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