Question 1
The job of the cardiac conduction system's pacemaker is to
◦ propagate electrical impulses.
◦ cause depolarization of myocardial cells.
◦ conduct electrical impulses.
◦ all of the above.
Question 2
The normal pacemaker of the heart is the
◦ sinus node.
◦ AV node.
◦ coronary sinus.
◦ Purkinje fibers.