Biology 0610 · IGCSE · Gas exchange in humans

Gas exchange in humans — practice question

Which table accurately sets out how the composition of inspired air differs from that of expired air?

  • Aoxygen less in inspired, more in expired; carbon dioxide less in inspired, more in expired
  • Boxygen less in inspired, more in expired; carbon dioxide more in inspired, less in expired
  • Coxygen more in inspired, less in expired; carbon dioxide less in inspired, more in expired
  • Doxygen more in inspired, less in expired; carbon dioxide more in inspired, less in expired

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