If the Cells of the SA Node Failed to Function,how

question 135

Multiple Choice

If the cells of the SA node failed to function,how would the heart rate be affected?

• A)The heart would beat faster because the AV node would be the pacemaker.
• B)The heart would beat slower because the AV node would be the pacemaker.
• C)The heart would stop beating because the SA node was not acting as the pacemaker.
• D)The heart would go into an arrhythmia because the Purkinje fibers would try to be the pacemaker.
• E)The heart would beat faster because the inherent rate of myocardial depolarization is faster than the SA node pacemaker.

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