Biology 5090 · O Level · Human gas exchange

Human gas exchange — practice question

Which row shows the sequence of events that causes air to move into the lungs?

  • Adiaphragm dome-shaped; rib cage moves down and inwards
  • Bdiaphragm dome-shaped; rib cage moves up and outwards
  • Cdiaphragm flattened; rib cage moves down and inwards
  • Ddiaphragm flattened; rib cage moves up and outwards

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