Other questions in this quiz

2. The innermost layer of a blood vessel is called the...

  • lumen
  • endothelium
  • tunica externa
  • tunica media

3. How thick is the endothelium lining?

  • One cell thick
  • 2 cells thick
  • Four cells thick
  • Half a cell thick

4. What is the purpose of smooth muscle in blood vessels?

  • Smooth muscle regulates blood flow and maintains blood pressure
  • Increases blood flow

5. What do the elastic fibres in arteries allow?

  • Elastic fibres reduce friction
  • Stretching- to accomadate changes in blood flow and pressure
  • Diffusion
  • Structure
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