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The normal pacemaker of the heart is the ______ which is located in the (right, left)

(atrium, ventricle). At rest, heart rate normally is about ____ beats per minute.

From the pacemaker, the impulse travels to the ______ and then to the ______ where the impulse is passed from atria to ventricles. This is the only location where the electrical impulse can move from upper to lower chambers. The impulse next travels along the _____ which carry it down the interventricular septum, and finally the impulse is conducted into the bulk of the ventricular myocardium by the _____.


If the SA nodes fails to serve as a pacemaker, then responsibility for setting the pace of the heart may be passed to the _______ which fires at approximately ______ beats per minute. If this part of the conduction system also fails, then autorhythmic fibers in the ventricles may take over, setting the pace of the heart at about _____ beats per minute. (11 points)

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the normal pacemaker of the heart is the sinoatrial nodes which is located in the Right Atrium. At rest, heart rate normally... View the full answer

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