,5) What term is used to refer to the process of electrical discharge and the flow of electrical
activity?
A) Repolarization
B) Depolarization
C) Polarization
D) Polarized
Answer: B
Page Ref: 4
Learning Obj.: 1.2
6) If polarizing is considered the ready state, then ________ would be considered the recovery
state.
A) discharge
M
B) polarization
C) repolarization
ED
D) depolarization
Answer: C
Page Ref: 4
C
Learning Obj.: 1.2
O
7) After leaving the area of the AV node, impulses go through the ________ to reach the right
and left bundle branches.
N
A) Purkinje fibers
B) Bundle of His
N
C) AV junction
D) SA node
O
Answer: B
Page Ref: 6
IS
Learning Obj.: 1.3
SE
8) Part of the parasympathetic branch of the autonomic nervous system is the ________ nerve.
A) vagus
B) coronary
C) aortic
U
,9) When stimulated, the ________ branch of the nervous system increases heart rate, AV
conduction, and irritability.
A) parasympathetic
B) sympathetic
C) pacemaker
D) inherent
Answer: B
Page Ref: 9
Learning Obj.: 1.4
10) Which cardiac cells are responsible for initiating and conducting pacemaker impulses?
A) Motor cells
B) Mechanical cells
M
C) Electrical cells
D) Atrioventricular cells
ED
Answer: C
Page Ref: 1
Learning Obj.: 1.1
C
11) Which is the normal pacemaker of the heart?
O
A) SA node
B) AV node
N
C) AV junction
D) Ventricle
N
Answer: A
Page Ref: 5
O
Learning Obj.: 1.3
IS
12) Which of the following is NOT a part of the normal cardiac conduction system?
A) Coronary sinus
SE
B) AV node
C) Purkinje Fibers
D) Internodal pathways
Answer: A
U
Page Ref: 5
Learning Obj.: 1.1
R
13) What is the term for the fail-safe mechanism that allows a lower pacemaker to take over
when a higher site fails?
A) Polarization
B) Irritability
C) AV conduction
D) Escape
Answer: D
Page Ref: 7
Learning Obj.: 1.4
, 14) Which of the following best explains the mechanism called irritability?
A) The ventricles repolarize before they are ready.
B) The normal pacemaker slows down and gives up control.
C) A lower pacemaker site speeds up to take control of the heart.
D) The normal pacemaker changes its inherent rate.
Answer: C
Page Ref: 7
Learning Obj.: 1.4
15) Which of the following does NOT happen when the sympathetic branch is stimulated?
A) Heart rate increases.
B) The heart becomes more irritable.
C) Impulses go faster through the AV node.
M
D) Ventricular conduction slows down.
Answer: D
ED
Page Ref: 8
Learning Obj.: 1.4
C
O
N
N
O
IS
SE
U
R
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