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6. What happens when you breathe in?

  • The diaphragm moves down and the ribs move up and out
  • The diaphragm moves up and the ribs move in and down

7. Which has less water vapour?

  • Inspired air
  • Expired air

8. What does the moist lining of the alveoli allow to dissolve before it diffuses through the wall?

  • Oxygen
  • Carbon dioxide
  • Blood

9. Which has less oxygen?

  • Expired air
  • Inspired air

10. What do alveoli have so that more gases can be exchanged?

  • A good texture
  • A good blood supply
  • A good wall
  • A good shape

11. The large number of alveoli provides a ____________ for gas exchange

  • Large surface area
  • Thick wall
  • Small surface area
  • Thin wall

12. What are at the end of the bronchioles?

  • Alveoli
  • Intercostal muscles
  • Ribs

13. What are the organs of gas exchange in humans?

  • Bronchus
  • Liver
  • Lungs
  • Heart

14. What happens to the volume of the thorax when you breathe in?

  • Increases
  • Decreases

15. On a diagram, what side would your right lung be?

  • Left
  • Right

16. What is not the job of the respiratory system?

  • To make energy through respiration
  • To get oxygen into the blood
  • To remove waste carbon dioxide from the blood

17. Which has less carbon dioxide?

  • Inspired air
  • Expired air

18. Inspired air is....

  • Air breathed in
  • Air breathed out

19. what needs a respiratory system because the diffusion of oxygen through the surface would be too slow?

  • Large animals
  • Small animals