Cardiovascular System: Blood Vessels Chapter 20.1 Quiz
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Questions and Answers

What is the function of vasa vasorum in the cardiovascular system?

  • Ensure one-way flow of blood in veins
  • Deliver nutrients and remove waste from the cells of large vessels (correct)
  • Control blood pressure in arteries
  • Transport blood away from the heart

    • Which blood vessels have valves to prevent backflow?

  • Veins (correct)
  • Capillaries
  • Venules
  • Arteries

    • In the cardiovascular system, what is the primary function of precapillary sphincters?

  • To constrict smooth muscle in arteries
  • To prevent blood backflow in veins
  • To regulate blood pressure in arterioles
  • To allow blood into a capillary bed or not (correct)

    • What is the function of a venule in the cardiovascular system?

    <p>Receive blood from capillaries</p> Signup and view all the answers

    What is the primary function of arterioles in the cardiovascular system?

    <p>Slow down blood flow to decrease blood pressure</p> Signup and view all the answers

    Which type of capillary allows plasma proteins and cells to pass through due to its structure?

    <p><strong>Sinusoid</strong></p> Signup and view all the answers

    What does the external elastic membrane separate in the cardiovascular system?

    <p>Media from outer tunic in large arteries</p> Signup and view all the answers

    What is the primary function of metarterioles in the cardiovascular system?

    <p>Control blood flow into a capillary bed</p> Signup and view all the answers

    Which factor has a direct impact on blood pressure and flow resistance in the cardiovascular system?

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

    What happens if mean arterial pressure (MAP) falls below 60 mm Hg for an extended period of time?

    <p>Risk of ischemia and hypoxia</p> Signup and view all the answers

    What is the role of the skeletal muscle pump in the venous system?

    <p>To contract leg muscles and increase pressure on veins</p> Signup and view all the answers

    How does vasoconstriction affect the flow in arteries?

    <p>Increases pressure and resistance, but decreases flow</p> Signup and view all the answers

    What are the main substances that use transporters to move through capillary walls?

    <p>Glucose, amino acids, Na+, K+, Ca++, and Cl-</p> Signup and view all the answers

    Which factor causes bulk flow to move fluid from capillaries into tissues?

    <p>Filtration due to high pressure in capillaries</p> Signup and view all the answers

    How much fluid is reabsorbed back into the capillaries each day?

    <p>24 L</p> Signup and view all the answers

    What hormone targets the kidneys to reabsorb water, increasing blood volume and pressure?

    <p>Antidiuretic Hormone (ADH)</p> Signup and view all the answers

    How does the Renin-Angiotensin-Aldosterone Mechanism affect blood pressure?

    <p>It produces Angiotensin 2 which is a powerful vasoconstrictor</p> Signup and view all the answers

    What type of shock involves an inability to deliver adequate oxygen for normal cellular metabolism?

    <p><strong>Circulatory Shock</strong></p> Signup and view all the answers

    Clinical Considerations: What can chronic high blood pressure (140/90 or above) lead to?

    <p><strong>All of the above</strong></p> Signup and view all the answers

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