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Sequence of Excitation
|How is the Heart excited?
|Automaticity from Non-Contractile Fibers: Pacemaker and conductiong system cells
|What is the path of Excitation through the Heart?
|SA Node --> AV Node -->His Bundle --> Purkinje Fibers
|What is t eh function of Cardiac Excitation?
|produce spontaneous DEPOLARIZATION forming regular Cardiac APs
|What is another name for Cardiac APs?
|Where is the Sinoatrial Node located?
|upper RIGHT Atrium
|What is the function of the SA Node?
|intiates wave of Excitation spread --> R & L Atria via Intercalated Discs
|Which Atrium contracts first?
|both Atria contract SIMULTANEOUSLY
|Where is the Atrioventricular Node located?
|floor of R Atrium
|What is the function of the VA Node?
|receives DEPOLARIZATION from Atrial cells; praopagates dep. via His Bundle and Purkinje Fibers --> contractile cells
|What is the purpose for the .1 sec SA-VA Transmission Delay?
|time for Ventricles to fill with Blood
|Whcich Ventricle contracts first?
|both Ventricles contract SIMULTANEOUSLY