Other questions in this quiz

2. What are the walls of the trachea made up of?

  • Goblet cells
  • Smooth muscle
  • Cartilage
  • Elastic fibres
  • Ciliates epithelium

3. Why does blood bring CO2 to the lungs?

  • Maintain diffusion gradient
  • To increase the concentration of CO2 in the alveolus
  • Reduce diffusion distance
  • So gaseous exchange is faster

4. How does the capillary wall reduce diffusion distance?

  • One cell thick
  • Few cells thick
  • Flattened or thin cells

5. Smooth muscle mainly makes up what wall in the respiratory system?

  • Alveolus
  • Bronchioles
  • Bronchi
  • Trachea

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