Arteries and Smooth Muscle Quiz
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Questions and Answers

Which of the following statements about precapillary sphincters is false?

  • They are regulated by the nervous system to control blood flow. (correct)
  • They are usually slightly constricted to prevent overfilling of capillaries.
  • They constrict or dilate depending on the metabolic needs of tissues.
  • They are found at the beginning of each capillary network.

    • What is the primary function of the tunica media in blood vessels?

  • To provide structural support and regulate blood pressure. (correct)
  • To filter waste products from the blood.
  • To transport oxygen and nutrients to tissues.
  • To produce red blood cells and platelets.

    • Which of the following tissues does not have capillaries?

  • Liver
  • Skeletal muscle
  • Kidney
  • Epidermis (correct)

    • What is the role of precapillary sphincters in regulating blood flow?

    <p>They dilate to increase blood flow to active tissues.</p> Signup and view all the answers

    Which of the following statements about the tunica media is correct?

    <p>The tunica media contains smooth muscle cells that regulate blood flow through precapillary sphincters.</p> Signup and view all the answers

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