Biology 0610 · IGCSE · Gas exchange in humans

Gas exchange in humans — practice question

The diagrams illustrate a person’s breathing depth and breathing rate at 12:00 and 13:00. What changes occur in the person’s breathing between 12:00 and 13:00?

  • Adepth of breathing decreases; rate of breathing decreases
  • Bdepth of breathing decreases; rate of breathing increases
  • Cdepth of breathing increases; rate of breathing decreases
  • Ddepth of breathing increases; rate of breathing increases

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