Cardiovascular Physiology Quiz
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Questions and Answers

What is the function of arterioles in relation to capillary beds?

  • Arterioles allow blood to flow freely into capillary beds
  • Arterioles reduce or shut off blood flow to capillary beds (correct)
  • Arterioles control the flow of oxygen through the capillary beds
  • Arterioles serve as a storage site for excess blood

    • What is the name of the slight thickening of the smooth muscle at the origin of a capillary bed from an arteriole?

  • Capillary Bed
  • Pre-capillary Sphincter (correct)
  • Arteriole Sphincter
  • Vascular Resistance

    • What happens when the smooth muscle in the wall of an arteriole contracts?

  • The blood flow to the capillaries increases
  • The blood flow to the capillaries reduces or shuts off (correct)
  • The precapillary sphincter opens
  • The vascular resistance decreases

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