What can shorten the conduction time of action potential through the atrioventricular (AV) node?
A)Parasympathetic nervous system
B)Catecholamines
C)Vagal stimulation
D)Sinoatrial node (SA)

Question

Quizplus · Accepted Answer

Catecholamines speed the heart rate, shorten the conduction time through the AV node, and increase the rhythmicity of the AV pacemaker fibers. The vagal nerve is part of the sympathetic nervous system and stimulation will decrease heart rate. The SA node is responsible for generating the electrical activity of the heart, but is not responsible for the time it takes for it to travel through the AV node.

What Can Shorten the Conduction Time of Action Potential Through