Problem:
Question: How would the heart rate be affected if there were a blockage of the AV node?
A: The heart rate would slow dramatically, and become extremely irregular, contracting only when the ventricles became overfilled,
B: The heart rate would increase,
C: The heart rate would be unaffected,
D: The heart would cease to contract,
E: The electrical stimuli from the SA node would be normal, but the rate of contraction would slow or be irregular
Give reasoning with your answer.