Biology 5090 · O Level · Human gas exchange

Human gas exchange — practice question

Which muscle groups contract to make the body breathe in?

  • Adiaphragm and external intercostal muscles
  • Bdiaphragm and internal intercostal muscles
  • Cdiaphragm muscles only
  • Dexternal and internal intercostal muscles

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