Other questions in this quiz

2. Why does blood bring CO2 to the lungs?

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

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

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

4. How does the capillary wall reduce diffusion distance?

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

5. What happens to the pressure in the chest cavity during inspiration?

  • Drops below atmospheric pressure
  • Rises above atmospheric pressure
  • Nothing


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