Small Arteries and Arterioles Anatomy Quiz
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Questions and Answers

What is the main difference between a small artery and an arteriole?

  • The type of smooth muscle cells in the tunica media
  • The thickness of the tunica adventitia
  • The size of the lumen
  • The presence of an internal elastic membrane (IEM) (correct)

    • What is the function of the tunica adventitia in small arteries and arterioles?

  • It is a thin, ill-defined sheath of connective tissue that blends with the connective tissue in which these vessels travel (correct)
  • It is the thickest layer of the vessel wall
  • It contains the internal elastic membrane (IEM)
  • It regulates blood flow to the tissues

    • What is the main difference between the endothelium in small arteries/arterioles and other arteries?

  • Gap junctions may be found between endothelial cells and the smooth muscle cells of the tunica media (correct)
  • The endothelium is absent in small arteries/arterioles
  • The endothelium is thicker in small arteries/arterioles
  • The endothelium is thinner in small arteries/arterioles

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