CH 4 Electrical Conduction System

Question 1

Commonly referred to as the primary pacemaker of the heart because it normally depolarizes more rapidly that any other part of the conduction system

Answer 1

SA Node

Question 2

Distribute the electrical impulse throughout the atria and transmit the impulse from the SA node to the AV node

Answer 2

Internodal Tracts

Question 3

A subdivision of the anterior internodal tract, conducts electrical activity from the SA node to the left atrium

Answer 3

Bachmann’s Bundle

Question 4

Location on the floor of the right atrium near the opening of the coronary sinus and just above the tricuspid valve; at the level of the AV node, the electrical activity is delayed approximately 0.05 sec

Answer 4

Atrioventricular (AV) Node

Question 5

The region where the AV node joins the Bundle of His

Answer 5

AV Junction

Question 6

The conduction pathway that leads out of the AV node and is also traditionally referred to as the common bundle

Answer 6

Bundle of His

Question 7

A network of fibers that carries electrical impulses directly to ventricular muscle cells

Answer 7

Purkinje’s Network