Biology 0610 · IGCSE · Gas exchange in humans

Gas exchange in humans — practice question

What order of changes happens as we breathe in?

  • Adiaphragm contracts volume of thorax increases pressure in lungs decreases
  • Bdiaphragm contracts volume of thorax increases pressure in lungs increases
  • Cdiaphragm relaxes volume of thorax increases pressure in lungs decreases
  • Ddiaphragm relaxes volume of thorax increases pressure in lungs increases

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