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The Cardiac Cycle

  1. Contraction
    Systole
  2. Relaxation
    Diastole
  3. ___ contract while ____ relax, then ____ contract while ____ relax.
    Atria, ventricles, ventricles, atria
  4. Sounds: Lubb-dupp

    Lubb=
    Dupp=
    Lubb= Ventricles contract, AV valves closing

    Dupp= Ventricles relax, semilunars close
  5. Behind right atrium
    "Pacemaker"- initiates action potential
    Sinoatrial (SA) node
  6. Near septum between atrium & ventricles

    Pauses the action potential to allow the atria to empty
    Atrioventricular (AV) node
  7. Found throughout the ventricles

    Fiber spread the action potential. Cause ventricles to contract
    Purkinje
  8. Depolarization of atria (SA node initiating systole of atria)
    P wave
  9. Depolarization of the ventricles (contraction of ventricles)
    QRS Wave
  10. Repolarization (diastole of ventricles)
    T wave
  11. Epinephrine (adrenaline)
    Increases contractions
  12. High AND Low K+ or Na+
    Decreases contractions
  13. Body temperature- High
    Increased contractions
  14. Age- older
    Decreased contractions
  15. Gender- Male
    Decreased Contractions
  16. Symptoms of poor blood circulation.

    Why does this happen?
    Temp change, Fatigue, Fainting, Pale skin

    This happens due to a lack of oxygen to muscles/ organs. Temp change is because blood carries heats
Author
GoBroncos
ID
357700
Card Set
The Cardiac Cycle
Description
Updated

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