Biology 0610 · IGCSE · Gas exchange in humans

Gas exchange in humans — practice question

Which row indicates the conditions under which diffusion of oxygen into the blood is most rapid?

  • Aalveolar surface area: high; concentration gradient: high; diffusion path distance: short
  • Balveolar surface area: high; concentration gradient: low; diffusion path distance: short
  • Calveolar surface area: low; concentration gradient: high; diffusion path distance: long
  • Dalveolar surface area: low; concentration gradient: low; diffusion path distance: long

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