Stages of Circulatory Shock Quiz
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Questions and Answers

What happens to the sympathetic reflexes in response to a decrease in arterial pressure after hemorrhage?

  • They stimulate the sympathetic vasoconstrictor system (correct)
  • They are inhibited
  • They stimulate the parasympathetic vasoconstrictor system
  • They have no effect on the body's response
  • What happens to cardiac output and arterial pressure when approximately 10% of the total blood volume is removed?

  • Arterial pressure decreases but cardiac output remains unchanged
  • Arterial pressure increases but cardiac output decreases
  • Cardiac output and arterial pressure decrease simultaneously
  • There is almost no effect on arterial pressure or cardiac output (correct)
  • Why does heart activity increase markedly after hemorrhage?

  • To increase the cardiac output (correct)
  • To decrease total peripheral resistance
  • To lower the heart rate
  • To constrict the arteries and veins
  • What allows a person to sustain a 30% to 40% loss of blood volume when the sympathetic reflexes are intact?

    <p>Increased venous return</p> Signup and view all the answers

    Why is the arterial pressure maintained at or near normal levels in the hemorrhaging person longer than the cardiac output?

    <p>Sympathetic reflexes are geared more for maintaining arterial pressure</p> Signup and view all the answers

    What is the main effect of sympathetic reflexes on maintaining arterial pressure?

    <p>Increasing total peripheral resistance</p> Signup and view all the answers

    What is the role of sympathetic constriction of the veins in maintaining venous return and cardiac output?

    <p>To maintain adequate venous return and prevent a decrease in cardiac output</p> Signup and view all the answers

    What occurs at about 50 mm Hg in the arterial pressure curve of Figure 24-1?

    <p>&quot;Second plateau&quot; occurs</p> Signup and view all the answers

    Which stage of shock is characterized by the normal circulatory compensatory mechanisms causing full recovery without outside therapy?

    <p>Nonprogressive stage</p> Signup and view all the answers

    In which stage of shock does the shock become steadily worse until death occurs?

    <p>Progressive stage</p> Signup and view all the answers

    At what point does all known therapy become inadequate to save a person's life in shock?

    <p>Irreversible stage</p> Signup and view all the answers

    What does hypovolemia mean in the context of circulatory shock?

    <p>Diminished blood volume</p> Signup and view all the answers

    Which factor decreases with hemorrhage, leading to a fall in cardiac output and the possibility of shock?

    <p>Filling pressure of the circulation</p> Signup and view all the answers

    What is the most common cause of hypovolemic shock?

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

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