Other questions in this quiz

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

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

3. How thick is the endothelium lining?

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

4. What does the tunica media contain?

  • Collagen fibres and elastic fibres
  • Elastic fibres and valves
  • Elastic fibres and smooth muscle
  • Collagen fibres and valves
  • Smooth muscle and collagen fibres

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

  • tunica externa
  • endothelium
  • tunica media
  • lumen

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