Biology 5090 · O Level · Human gas exchange

Human gas exchange — practice question

What takes place during expiration?

  • Adiaphragm muscles contract; pressure in thoracic cavity falls and then rises; volume of thoracic cavity decreases
  • Bdiaphragm muscles relax; pressure in thoracic cavity rises and then falls; volume of thoracic cavity decreases
  • Cdiaphragm muscles contract; pressure in thoracic cavity rises and then falls; volume of thoracic cavity increases
  • Ddiaphragm muscles relax; pressure in thoracic cavity falls and then rises; volume of thoracic cavity increases

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