Other questions in this quiz

2. How does the capillary wall reduce diffusion distance?

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

3. Why does blood bring CO2 to the lungs?

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

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

  • Alveolus
  • Trachea
  • Bronchioles
  • Bronchi

5. What type of epithelium is found in the walls of the alveolus?

  • Squamous
  • Ciliated


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