Question

Which would occur as a result of the blockage of action potential propagation throughout the bundle of His?

a. There would be a slowing of the frequency of contraction of the ventricles
b. The atria would contract more frequently than the ventricles
c. The SA node would no longer set the pace for atrial contraction
d. The atria and ventricles would no longer beat in synchrony
e. The ventricular contraction would not be impaired

Answer 1

The blockage of action potential propagation throughout the bundle of His would result in the atria and ventricles no longer beating in synchrony.

Step-by-step explanation:

The correct answer is d. The atria and ventricles would no longer beat in synchrony. When the action potential propagation throughout the bundle of His is blocked, the electrical signal that coordinates the contraction of the atria and ventricles is disrupted. As a result, the atria and ventricles would not contract together in sync, leading to an irregular heartbeat.