Arterial Layers Quiz
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Questions and Answers

Which layer of tissue borders the intima and the media in arteries?

  • Internal elastic membrane (correct)
  • Smooth muscle cells
  • External elastic membrane
  • Endothelial lining
  • What does the intact endothelium in the intima synthesize to regulate thrombosis?

  • Endothelin and angiotensin-converting enzyme
  • Prostacyclin and plasminogen activator (correct)
  • Histocompatibility antigens and adhesion molecules
  • Von Willebrand factor and prostacyclin
  • What is the primary function of the intimal endothelium in regulating blood flow and vascular reactivity?

  • Promoting smooth muscle cell proliferation
  • Synthesizing vasoconstrictors and vasodilators (correct)
  • Modulating immune and inflammatory reactions
  • Producing prothrombotic molecules
  • What is increasingly implicated in plaque rupture and plaque erosion in complex atheromas?

    <p>Inflammatory mediators</p> Signup and view all the answers

    What is the outer layer of the artery called?

    <p>Adventitia</p> Signup and view all the answers

    What do the smooth muscle cells in the media of arteries do?

    <p>Dilate and constrict to accommodate blood pressure and flow</p> Signup and view all the answers

    Where does resistance to blood flow primarily occur?

    <p>Arterioles</p> Signup and view all the answers

    What is the function of the vasa vasorum?

    <p>Perfuse the media</p> Signup and view all the answers

    Where are the pulsations in the radial artery located?

    <p>On the lateral flexor surface of the arm</p> Signup and view all the answers

    What is the size range of small arterioles?

    <p>20 to 100 um in diameter</p> Signup and view all the answers

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