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Pre-Lab Questions
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1
The _______ of the conduction system is known as the pacemaker.
A)SA node
B)AV node
C)AV bundle
D)left bundle branch
2
The ________ of the conduction system is/are located throughout the ventricular walls.
A)AV node
B)left bundle branch
C)right bundle branch
D)Purkinje fibers
3
The first of two heart sounds (lubb) occurs when the
A)AV valves open.
B)AV valves close.
C)semilunar valves open.
D)semilunar valves close.
4
One cardiac cycle would consist of
A)left chamber contractions followed by right chamber contractions.
B)right chamber contractions followed by left chamber contractions.
C)atrial chamber contractions followed by ventricular chamber contractions.
D)ventricular chamber contractions followed by atrial chamber contractions.
5
The depolarization of ventricular fibers is indicated by the ______ of an ECG.
A)P wave
B)QRS complex
C)T wave
D)P-Q interval
6
The dupp sound occurs when the semilunar valves are closing during ventricular diastole.
A)True
B)False
7
The P wave of an ECG occurs during the repolarization of the atria.
A)True
B)False







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