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WorksheetsChapter 4 - The Electrical Conduction System
Total questions: 15
Worksheet time: 8mins
The pacemaker that fires at 20 to 40 beats per minute is:
The AV node
The bundle of His
The SA node
Purkinje's network
If the vagus nerve is stimulated, the heart rate will:
Decrease
Increase
It is generally believed that a bit less than ______ of the cells are actual pacemaker cells.
50%
75%
85%
25%
The SA node impulses result in:
Repolarization
Diastole
Depolarization
All of the above
Bachmann's bundle is located in the:
Left atrium
Left ventricle
Top of right atrium
Right ventricle
The internodal tracts consist of anterior, middle, and posterior. They are also known as all of the following EXCEPT:
Thorel's pathway
Wenckebach's bundle
Beasley's pathway
Bachmann's bundle
A(n) _________ pathway may be defined as an irregular muscle connection between the atria and the ventricles that bypasses the AV node.
Universal
Conductive
Accessory
Thorel's
The bundle of His lies at the ____________ of the interventricular septum.
Right
Top
Bottom
Left
Which part of the conduction system has a firing rate of 60 to 100?
Bundle branches
Purkinje fibers
SA node
AV node
Nodes and bundles are located primarily beneath the:
Pericardium
Myocardium
Epicardium
Endocardium
The node that is located just above the tricuspid valve is the:
Central node
AV node
SA node
Purkinje node
The area where the internodal pathways join the bundle of His is:
Purkinje's network
The AV junction
The left bundle branch
The right bundle branch
The bundle of His is also traditionally referred to as the ________ bundle.
Common
Simple
Universal
Dedicated
In the normal heart, this is the ONLY pathway between the atria and ventricles.
SA node
Right bundle branch
Left bundle branch
AV node
The three-lead EKG strip is representative of the mechanical activity of the heart.
True
False
