How Much Do You Know About Cardiac Physiology? Trivia Quiz

15 Questions | Total Attempts: 84

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Physiology Quizzes & Trivia

The human heart is a fascinating organ, and it weighs about 12 ounces. The heart serves the purpose of pumping blood throughout the body and removing carbon dioxide in it. Do you think that you have what it takes to pass the cardiac physiology quiz? Why don’t you give it a shot and see if you need more revising time?


Questions and Answers
  • 1. 
    Which is the cardiac pacemaker?
    • A. 

      SA node

    • B. 

      AV node

    • C. 

      Bundle of His

    • D. 

      Purkinje system

    • E. 

      None of the above

  • 2. 
    The SA node:
    • A. 

      Is composed of large round cells

    • B. 

      Has many organelles

    • C. 

      Develops from the embryonic right side

    • D. 

      Has cells connected by gap junctions

    • E. 

      All of the above

  • 3. 
    Which is NOT true of the AV node?
    • A. 

      Increases LV contraction

    • B. 

      Delays SA node activity so atria can empty

    • C. 

      Relays SA signals to AV bundles

    • D. 

      Located in the interatrial septum

    • E. 

      All of the above

  • 4. 
    Which is true of the SA node?
    • A. 

      Higher body temp, lower rate

    • B. 

      Higher body temp, higher rate

    • C. 

      Composed of P cells

    • D. 

      Composed of L cells

    • E. 

      Both B and C

  • 5. 
    Bundle of His:
    • A. 

      Divides at the interatrial septum

    • B. 

      Is important in hypothalmic stimulation

    • C. 

      Conducts signal from ventricles to atria

    • D. 

      All of the above

    • E. 

      None of the above

  • 6. 
    Which is NOT part of a normal 12 LEAD ECG?
    • A. 

      AVR

    • B. 

      AV1

    • C. 

      V2

    • D. 

      V6

    • E. 

      All of the above

  • 7. 
    Purkinje Fibers/System:
    • A. 

      Located on inner ventricular wall

    • B. 

      Located on inner atrial wall

    • C. 

      Located on outer atrial wall

    • D. 

      All of the above

    • E. 

      Both A and C

  • 8. 
    Which is TRUE about pacemaker potentials?
    • A. 

      H channels and Ca++ L channels produce the prepotential

    • B. 

      Ca++ L channels produce the impulse

    • C. 

      C++ released from the mitochondria may be involved with the impulse

    • D. 

      B channels and Ca++ T channels produce the prepotential

    • E. 

      Ca++ L channels produce the prepotential

  • 9. 
    Which is true?
    • A. 

      Sympathetic decreases frequency but keeps potential the same

    • B. 

      Sympathetic increases frequency but changes potential

    • C. 

      Vagal increases frequency and potential

    • D. 

      None of the above

    • E. 

      B and C

  • 10. 
    Ach released at SA node:
    • A. 

      Binds with M1 receptors and leads to hyperpolarization

    • B. 

      Binds with M1 receptors and leads to hypopolarization

    • C. 

      Binds with M2 receptors and leads to hyperpolarization

    • D. 

      Binds with M2 receptors but does not change polarization

    • E. 

      Binds with M1 receptors but does not change polarization

  • 11. 
    M2 receptor activation:
    • A. 

      Increases intracellular cAMP and slows Ca++ channel opening

    • B. 

      Decreases intracellular cAMP and increases Ca++ channel opening

    • C. 

      Increases intracellular cAMP and increases K+ channel opening

    • D. 

      Decreases intracellular cAMP and decreases K+ channel opening

    • E. 

      Decreases intracellular cAMP and decreases Ca++ channel opening

  • 12. 
    NE from sympathetic nerve endings:
    • A. 

      Decrease cAMP and increase ca++ L channel opening

    • B. 

      Increase cAMP and decrease Ca++ L channel opening

    • C. 

      Decrease cAMP and decrease Ca++ L channel opening

    • D. 

      Increase cAMP and increase Ca++ L channel opening

    • E. 

      Binds to B2 cholinergic receptors

  • 13. 
    Which is FALSE about an ECG
    • A. 

      Is the algebraic product of the action potentials

    • B. 

      Is based on Einstein's triangle

    • C. 

      Bipolar leads are a newer technology than unipolar leads

    • D. 

      ALL OF THE ABOVE

    • E. 

      NONE OF THE ABOVE

  • 14. 
    Which is true?
    • A. 

      Bradycardia is a slowing due to vagal stim

    • B. 

      Tachycardia is a speeding due to vagal stim

    • C. 

      Normal SA node firing is 35/minute

    • D. 

      Tachycardia is a slowing due to sympathetic stim

    • E. 

      HR slows during inspiration

  • 15. 
    Which is FALSE about heart block:
    • A. 

      1st deg - not all impulses reach ventricle

    • B. 

      1st deg - PR interval shortened

    • C. 

      2nd deg - not all impulses reach ventricles

    • D. 

      3rd deg - ventricles beat faster than atria

    • E. 

      A, B and D

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