Which component of the cardiac conduction system distributes impulses to the ventricles?

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Multiple Choice

Which component of the cardiac conduction system distributes impulses to the ventricles?

The impulses reach the ventricles through a specialized rapid-distribution network that spreads the signal across the ventricular muscle all at once. This network is the Purkinje fibers, which run throughout the ventricles and deliver the impulse quickly to the entire ventricular myocardium, producing synchronized ventricular contraction. The other components play different roles in the sequence. The SA node starts the heartbeat by generating the impulse, the AV node provides a brief delay to allow ventricular filling, and the Bundle of His carries the impulse from the AV node down to the ventricles and toward the Purkinje system. But the actual rapid distribution to the ventricular walls is accomplished by the Purkinje system.

The impulses reach the ventricles through a specialized rapid-distribution network that spreads the signal across the ventricular muscle all at once. This network is the Purkinje fibers, which run throughout the ventricles and deliver the impulse quickly to the entire ventricular myocardium, producing synchronized ventricular contraction.

The other components play different roles in the sequence. The SA node starts the heartbeat by generating the impulse, the AV node provides a brief delay to allow ventricular filling, and the Bundle of His carries the impulse from the AV node down to the ventricles and toward the Purkinje system. But the actual rapid distribution to the ventricular walls is accomplished by the Purkinje system.

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