SHARP EKG TEST BANK (2026) comprehensive questions and verified detailed solutions (MULTIPLE CHOICES) |100% CORRECT!!

SHARP EKG TEST BANK (2026) comprehensive questions and verified detailed solutions (MULTIPLE CHOICES) |100% CORRECT!! 1. myocardial muscle cells 2. myocardial pacemaker cells What are the two basic kinds of cardiac cells? 1. Automaticity 2. Excitability 3. Conductivity 4. Contractility What are the 4 primary cell characteristics? 1. sodium 2. potassium What are the two major ions that affect cardiac function? Potassium What are the primary ions inside the cell? Sodium What are the primary ions outside the cell? 1. membrane channels 2. concentration gradient 3. electrical gradient 4. sodium-potassium pump Distribution of ions on either side of the membrane is determined by which several factors? In the upper wall of the right atrium/near the inlet of the superior vena cava Where is the SA node located? 60-100 bpm What is the intrinsic rate of the SA node? 40-60 bpm Pacemaker cells in the AV junction generate electrical impulses at what rate? 1. slow conduction of the electrical impulse through the AV node to allow atria to empty into the ventricles (atrial kick) 2. to serve as a back pack pacemaker 3. protect ventricles from fast rates What are the 3 functions of the AV node? To the bundle of His After the delay in the AV node, where does the impulse go? The Bundle of His (AV Bundle) runs from the AV node through the IV septum, splitting into R. and L. branches and eventually breaking into Purkinje fibers as it spreads through the ventricular walls What is the function of the bundle of His? 30-40 bpm What is the rate of electrical impulse the Purkinje Fibers have?