The atrioventricular node (AV node)
A)is the pacemaker of the heart.
B)is located in the upper part of the right atrium.
C)has a rate that is normally faster than the SA node.
D)delays the electrical signal coming from the atria into the ventricles.

Question

Quizplus · Accepted Answer

The atrioventricular (AV) node is located near the bottom of the right atrium and functions to delay the electrical signal coming from the atria before it passes into the ventricles. This delay allows for the atria to completely contract before the ventricles are stimulated, ensuring effective blood flow through the heart. The AV node is not the pacemaker of the heart, as that role belongs to the sinoatrial (SA) node which is located in the upper part of the right atrium. The rate of the AV node is normally slower than the SA node.

The Atrioventricular Node (AV Node)