How the lungs are adapted for gas exchange

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  • Created by: emily_w
  • Created on: 18-11-14 12:33

1. Why must the lungs maintain the diffusion gradient?

  • If the gradient is not maintained, diffusion will stop because the gases have reached equilibrium
  • Diffusion will stop if the gradient is not maintained.
  • If the gradient is not maintained, the person will suffocate
  • If the gradient is not maintained, the person will get carbon dioxide poisoning.
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Other questions in this quiz

2. What is the diameter of an alviolus?

  • 40-50µm.
  • 100-300µm
  • 500-700µm
  • 200-300µm

3. How do the alvioli increase the exchange surface of the lungs?

  • They have a large surface area
  • They are numerous and folded
  • They are small and folded
  • They reduce the distance gas has to diffuse across.

4. How does the transport system maintain the diffusion gradient?

  • Qxygenated blood is transported around the body
  • Oxygenated blood cells are removed via the capillaries
  • There is low pressure in the capillaries
  • The capillaries widen

5. What does squamous mean?

  • Tightly packed
  • Flattened
  • Spherical
  • Square


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