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OPRA Biomedical Sciences QUESTION #3811
Question 1
Which of the following statements about the structural and functional properties of blood vessels is CORRECT?
  • Arteries have thinner smooth muscle layers than veins
  • Capillary walls have an elastic layer
  • The pressure inside a vein is less than in an artery✔️
  • Capillaries provide the greatest resistance to blood flow
Correct Answer Explanation
Veins operate at much lower pressures than arteries, which carry blood directly from the high-pressure cardiac output. Arterioles provide the greatest resistance to blood flow, not capillaries.