Other questions in this quiz

2. Which is not a way in which blood flow is maintained in the veins?

  • Elastic recoil
  • Breathing movements of the chest act as a pump forcing blood towards the heart
  • Muscles contract squeezing the veins forcing blood towards the heart
  • One way valves to prevent backflow

3. What is the diameter of a capillary?

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

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

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

5. What is the function of arterioles?

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

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Aliyyunakber1

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Tech problems, plz check

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