Biology 0610 · IGCSE · Gas exchange in humans

Gas exchange in humans — practice question

Which row describes what happens during inhalation?

  • Adiaphragm contracts; external intercostal muscles contract
  • Bdiaphragm contracts; external intercostal muscles relax
  • Cdiaphragm relaxes; external intercostal muscles contract
  • Ddiaphragm relaxes; external intercostal muscles relax

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI