Exam 4: The Electrical Conduction System

The pacemaker that fires at 20 to 40 beats per minute is:

Which part of the conduction system has a firing rate of 60 to 100?

The three-lead EKG strip is representative of the mechanical activity of the heart.

The node that is located just above the tricuspid valve is the:

Nodes and bundles are located primarily beneath the:

The area where the internodal pathways join the bundle of His is:

The bundle of His lies at the ________ of the interventricular septum.

The internodal tracts consist of anterior,middle,and posterior. They are also known as all of the following EXCEPT:

A(n)________ pathway may be defined as an irregular muscle connection between the atria and the ventricles that bypasses the AV node.

The SA node impulses result in:

Bachmann's bundle is located in the:

The bundle of His is also traditionally referred to as the ________ bundle.

If the vagus nerve is stimulated,the heart rate will:

In the normal heart,this is the ONLY pathway between the atria and ventricles.

It is generally believed that a bit less than ________ of the cells are actual pacemaker cells.