Understanding Electrical Stimulation in the Heart Practice Test

The parasympathetic vagus nerve slows down the heart rate.

Many of the action potentials are not large enough to cause a contraction of the heart.

The atrioventricular node requires multiple action potentials in order to continue the electrical signal through the heart.

Half of the action potentials are dedicated to the contraction of the atria, and the other half are dedicated to the contraction of the ventricles.