How the lungs are adapted for gas exchange

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

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

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

2. How far do gases have to diffuse to be exchanged in the lung?

  • 0.5µm
  • 3µm
  • 1µm
  • 2µm

3. How thick are the walls of the capillaries and alvioli?

  • One cell each
  • One cell between them
  • Two cells each
  • Three cells each

4. How do squamous cells aid the lungs in gas exchange?

  • They speed up gas exchange
  • They decrease the distance the gases have to diffuse across.
  • They increase the distance the gases have to diffuse across
  • They are squashed together, so more of them can fit in an alviolus.

5. What is the diameter of an alviolus?

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


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