Blood Vessels

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  • Created by: issyafd1
  • Created on: 30-04-16 14:15

1. What do arteriole walls contain?

  • Only smooth muscle
  • More smooth muscle and less elastin than arteries
  • More smooth muscle and more enodthelium than arteries
  • Less smooth msucle and more collagen than arteries
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2. What is the function of arterioles?

  • Prevent the diffusion of excess water
  • Constrict and dilate to control blood flow to individual organs
  • Link capillaries and veins
  • Remove tissue fluid

3. What do the walls of venules contain?

  • Little smooth msucle
  • Lots of elastic fibre
  • Lots of collagen
  • Lots of collagen and elastic fibre

4. What is the diameter of a capillary?

  • 7.5-8 um
  • 9-10 um
  • 0.5 um
  • 4.5-6 um

5. Why do capillaries in the brain have tight junctions?

  • To prevent fluid on the brain
  • Prevent the drainage of brain fluid
  • To prevent essential minerals diffusing into the capillaries
  • Ensure that oxygen does not diffuse back into the capillaries

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Aliyyunakber1

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Tech problems, plz check

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