Cardiovascular System: Blood Vessels and Circulation Chapter 20 Quiz
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Questions and Answers

What is the function of vasa vasorum in blood vessels?

  • Deliver nutrients and remove waste from the cells of large vessels (correct)
  • Regulate blood pressure in capillaries
  • Assist in blood clotting process
  • Form new blood cells in the bone marrow

    • What is the main function of precapillary sphincters?

  • Regulate oxygen content in the blood
  • Stimulate blood clotting
  • Maintain blood pressure in veins
  • Control blood flow into capillary beds (correct)

    • Which type of artery has a diameter ranging from 0.1mm to 10mm?

  • Arteriole
  • Muscular artery (correct)
  • Elastic artery
  • Capillary

    • What is the primary function of capillaries in the circulatory system?

    <p>Supply blood to tissues by perfusion</p> Signup and view all the answers

    What is the function of metarterioles in the circulatory system?

    <p>Connect arterioles and capillaries, with a sphincter to regulate blood flow</p> Signup and view all the answers

    How are venules different from veins?

    <p>Venules are fed by capillaries, while veins carry blood back to the heart</p> Signup and view all the answers

    What does diapedesis primarily occur in?

    <p>Venules and capillaries</p> Signup and view all the answers

    Which factor influences blood flow by increasing resistance in blood vessels?

    <p><strong>Viscosity</strong> of blood</p> Signup and view all the answers

    'Pulse pressure' is defined as the difference between which two readings?

    <p><strong>Systolic</strong> and <strong>diastolic</strong> pressure</p> Signup and view all the answers

    'Mean arterial pressure (MAP)' is calculated as:

    <p>(Diastolic BP) + (Systolic BP - Diastolic BP) / 3</p> Signup and view all the answers

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

    <p>To increase pressure in veins to push blood towards the heart</p> Signup and view all the answers

    Which factor contributes to venoconstriction?

    <p>Increases resistance in veins and decreases flow</p> Signup and view all the answers

    What is the primary role of capillaries in the circulatory system?

    <p>Transport gases, nutrients, and wastes to and from cells</p> Signup and view all the answers

    How does filtration differ from reabsorption in capillary exchange?

    <p>Filtration moves fluid from high pressure capillary to low pressure tissues, reabsorption is the opposite</p> Signup and view all the answers

    How does osmotic pressure affect fluid movement in capillaries?

    <p>Decreases fluid reabsorption back into capillaries</p> Signup and view all the answers

    What is the role of the lymphatic system in the circulatory system?

    <p>To pick up excess fluid filtered by capillaries and return it to circulation</p> Signup and view all the answers

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

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

    What is the primary function of Erythropoietin (EPO) in the vascular system?

    <p>Stimulates erythrocyte production in bone marrow</p> Signup and view all the answers

    How does autoregulation of perfusion respond to decreased oxygen levels in tissues?

    <p>It causes vasoconstriction in arterioles to decrease blood flow</p> Signup and view all the answers

    What physiological effect does exercise have on LDL cholesterol levels?

    <p>Decreases LDL cholesterol levels</p> Signup and view all the answers

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