The "QRS" complex visible in a normal electrocardiogram is associated with the
A)excitation from the AV node and depolarization of the ventricles.
B)excitation from the SA node and depolarization of the atria.
C)excitation from the SA node and repolarization of the ventricles.
D)excitation from the AV node and repolarization of the atria.
E)activity in the vagus nerve and release of acetylcholinE.

Question

Quizplus · Accepted Answer

The "QRS" complex is associated with excitation from the AV node and depolarization of the ventricles. This is the electrical activity that drives the contraction of the ventricles and is a key component of a normal heartbeat.

The "QRS" Complex Visible in a Normal Electrocardiogram Is Associated