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

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

4. During expiration what happens to the diaphragm?

  • Relaxes and is pushed up
  • Pushes digestive organs down
  • Contracts
  • Becomes flatter

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

  • Bronchi
  • Alveolus
  • Bronchioles
  • Trachea

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