Trivia: The Cardiovascular System Quiz!

26 Questions | Total Attempts: 32

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Trivia: The Cardiovascular System Quiz!

Do you suppose you know enough about the cardiovascular system? The cardiovascular system is comprised of the heart and the circulatory system. The heart, which is a muscular organ, pumps blood and nutrients into the body. The structures of the cardiovascular system include the heart, blood vessels, and blood. The lymphatic system is strongly associated with the cardiovascular system. If you are studying for an exam, this quiz will get the juices flowing.


Questions and Answers
  • 1. 
    Cardiac muscle cells are connected to adjacent cardiac muscle cells by junctions called __________.
  • 2. 
    Cardiac muscle fibers are interconnected in branching networks that spread in all directions of the heart to form a ______ which is a mass of merging cardiac muscle cells.
  • 3. 
    The heart contains two functional syncytia. They are the _________ which is located in the atrial walls and the _______ which is located in the ventricular walls. If any part of the syncytium is stimulated, the whole structure contracts as a unit.
  • 4. 
    Except for a small region in the floor of the _______, the atrial syncytium is separated from the ventricular syncytium by the _______________.
  • 5. 
    The _________ is a network of specialized cardiac muscle cells that initiates and distributes electrical impulses.
  • 6. 
    Most of the specialized cardiac muscle cells involved in the cardiac conduction system are smaller than the _________ of the myocardium and contain fewer ________. Instead of contracting they initiate and distribute the _____________.
  • 7. 
    The conduction system of the heart includes the _____ which is a small mass of specialized cardiac muscle cells situated on the posterior wall of the right atrium just below the opening of the superior vena cava beneath the epicardium.
    • A. 

      A-V node

    • B. 

      Pacemaker

    • C. 

      S-A node

    • D. 

      Atrial synctium

  • 8. 
    The fibers of the S-A node are continuous with those of the __________.
  • 9. 
    The S-A node is referred to as the _________ of the heart.
  • 10. 
    The S-A node contains pacemaker cells which establish the __________. It is responsible for the ________ of the heart.
  • 11. 
    The S-A node initiates one impulse after another _____ times per minute
    • A. 

      50-60

    • B. 

      60-70

    • C. 

      70-80

    • D. 

      80-90

    • E. 

      90-100

  • 12. 
    As the cardiac impulse travels from the S-A node into the __________, the atria _______ almost simultaneously.
  • 13. 
    _________ are fibers that are interspersed amongst the atrial muscle fibers that conduct the impulses to the A-V node.
    • A. 

      Purkinje fibers

    • B. 

      Myofibrils

    • C. 

      Contractile fibers

    • D. 

      Junctional fibers

    • E. 

      S-A fibers

  • 14. 
    Junctional fibers have very _____ diameters that cause the impulses they carry to be ________.
  • 15. 
    The _______ is a mass of specialized cardiac muscle cells located in the lower right atrium near the entrance of the coronary sinus.
    • A. 

      S-A node

    • B. 

      Auricle

    • C. 

      A-V node

    • D. 

      Bundle branches

    • E. 

      Myofibril

  • 16. 
    The A-V node provides the only normal _____________ between the atrial and ventricular syncytia.
  • 17. 
    The ____________ does not conduct impulses and thus isolates the atrial myocardium from the ventricular myocardium.
  • 18. 
    The cells composing the A-V node are ______ efficient in conducting an impulse which causes a short delay in the transmission of the impulse to the_________.
  • 19. 
    What is the importance of the A-V node?
    • A. 

      It permits the ventricles to complete their contraction and empty their blood into the pulmonary trunk and aorta

    • B. 

      It helps to close the A-V valves

    • C. 

      It has no real significance

    • D. 

      It permits the atria to complete their contraction and empty their blood into the ventricles before they contract

    • E. 

      It conducts electrical impulses to the purkinje fibers

  • 20. 
    Once the cardiac impulse reaches the distal end of the A-V node, it passes into a group of large fibers that make up the __________. This bundle is located in the superior portion of the ____________ where impulses travel __________.
  • 21. 
    The A-V bundle persists only briefly before dividing into the _____ and ______ bundle branches. These branches extend toward the _____ of the heart in the _________.
  • 22. 
    The bundle branches conduct the cardiac impulse to the ___________.
  • 23. 
    The purkinje fibers are very _____ fibers, essentially long strands of _____-shaped cells with few ______. They are located in the _________.
  • 24. 
    Purkinje fibers complete the conduction pathway through the __________, penetrate into the _____ and then travel ____ into the __________. They give off many small paths and become continuous with the _____________.
  • 25. 
    Purkinje fibers conduct impulses very _________; as fast as _____________.
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