Heart Rate and Cardiac Output
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Questions and Answers

Which of the following is NOT a component of the cardiovascular system?

  • Blood vessels
  • Lungs (correct)
  • Blood
  • Heart
  • What is the function of blood vessels in the cardiovascular system?

  • To receive blood as it returns to the heart
  • To carry oxygen and nutrients to the body's cells
  • To ensure each capillary bed receives fresh blood (correct)
  • To pump blood away from the heart
  • How does blood flow through the systemic circuit differ from blood flow through the heart?

  • Blood flow through the systemic circuit is in series
  • Blood flow through the systemic circuit is in a random pattern
  • Blood flow through the systemic circuit is in a circular pattern
  • Blood flow through the systemic circuit is in parallel (correct)
  • During ventricular contraction, the papillary muscles (relax/contract).

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

    If end-diastolic volume does not change but end-systolic volume decreases, stroke volume (increases/decreases).

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

    If end-diastolic volume does not change but end-systolic volume decreases, ejection fraction (increases/decreases).

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

    If sympathetic and parasympathetic inputs are constant and end-diastolic volume increases, contractility of the ventricular myocardium (increases/decreases).

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

    Which of the following is true about the electrocardiogram (ECG)?

    <p>The T wave represents ventricular depolarization.</p> Signup and view all the answers

    Which valves in the heart allow blood to flow from atrium to ventricle?

    <p>Atrioventricular valves</p> Signup and view all the answers

    What is the mean arterial pressure (MAP)?

    <p>The average pressure throughout the cardiac cycle.</p> Signup and view all the answers

    What is the stroke volume (SV)?

    <p>The volume pumped by each ventricle in a single heartbeat.</p> Signup and view all the answers

    Which of the following factors does NOT affect stroke volume?

    <p>Heart rate</p> Signup and view all the answers

    When does the minimum aortic pressure occur during the cardiac cycle?

    <p>Immediately before opening of the aortic semilunar valve</p> Signup and view all the answers

    What is the first heart sound associated with?

    <p>The beginning of isovolumetric contraction</p> Signup and view all the answers

    Which of the following is true about the QRS complex of the ECG?

    <p>It represents ventricular depolarization</p> Signup and view all the answers

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