Cardiovascular System Functions Quiz
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Questions and Answers

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

  • Transporting hormones and other molecules
  • Removing carbon dioxide and waste
  • Delivering oxygen and nutrients
  • Regulating immune function (correct)

    • Which part of the cardiac conduction system is responsible for initiating the contraction signal?

  • Atrioventricular (AV) node
  • Purkinje fibers
  • AV bundle (bundle of His)
  • Sinoatrial (SA) node (correct)

    • How does the parasympathetic nervous system affect heart rate?

  • Has no effect on heart rate
  • Increases heart rate above the intrinsic rate
  • Increases heart rate to the maximal possible rate
  • Decreases heart rate below the intrinsic rate (correct)

    • What is the main effect of the sympathetic nervous system on the heart?

    <p>Increases heart rate and contractility</p> Signup and view all the answers

    Which part of the cardiac conduction system relays the electrical signal from the atrioventricular (AV) node to the ventricles?

    <p>AV bundle (bundle of His)</p> Signup and view all the answers

    What is the intrinsic heart rate of the heart?

    <p>100 beats per minute</p> Signup and view all the answers

    How does endurance training affect resting heart rate?

    <p>Decreases resting heart rate</p> Signup and view all the answers

    Which part of the cardiac conduction system delays the electrical signal before it is relayed to the ventricles?

    <p>Atrioventricular (AV) node</p> Signup and view all the answers

    Which branch of the autonomic nervous system increases heart rate and contractility?

    <p>Sympathetic nervous system</p> Signup and view all the answers

    What is the main function of the Purkinje fibers in the cardiac conduction system?

    <p>Spreading the electrical signal throughout the ventricle walls</p> Signup and view all the answers

    What is the main function of the sympathetic nervous system?

    <p>Increase heart rate</p> Signup and view all the answers

    Which of the following is an intrinsic control mechanism of blood flow?

    <p>Myogenic mechanisms</p> Signup and view all the answers

    During ventricular diastole, what happens to the ventricular pressure?

    <p>It drops</p> Signup and view all the answers

    Which of the following is NOT a function of blood?

    <p>Production of hormones</p> Signup and view all the answers

    What is the main role of baroreceptors in the body?

    <p>Regulate arterial pressure</p> Signup and view all the answers

    Which of the following is true about ventricular fibrillation?

    <p>It compromises pumping capacity</p> Signup and view all the answers

    What is the primary factor affecting resistance in blood flow?

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

    Which part of the cardiac cycle involves relaxation and filling of the heart chambers?

    <p>Ventricular diastole</p> Signup and view all the answers

    What occurs during functional sympatholysis in muscle tissue?

    <p>Improved extraction at the tissue level</p> Signup and view all the answers

    Which vessel carries blood away from the heart?

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

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