,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.
S
A) discharge
B) polarization
R
C) repolarization
D) depolarization
VE
Answer: C
Page Ref: 4
Learning Obj.: 1.2
IE
7) After leaving the area of the AV node, impulses go through the ________ to reach the right
and left bundle branches.
H
A) Purkinje fibers
B) Bundle of His
AC
C) AV junction
D) SA node
Answer: B
Page Ref: 6
M
Learning Obj.: 1.3
8) Part of the parasympathetic branch of the autonomic nervous system is the ________ nerve.
EA
,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
S
B) Mechanical cells
C) Electrical cells
R
D) Atrioventricular cells
Answer: C
VE
Page Ref: 1
Learning Obj.: 1.1
11) Which is the normal pacemaker of the heart?
A) SA node
B) AV node
IE
H
C) AV junction
D) Ventricle
AC
Answer: A
Page Ref: 5
Learning Obj.: 1.3
M
12) Which of the following is NOT a part of the normal cardiac conduction system?
A) Coronary sinus
B) AV node
EA
C) Purkinje Fibers
D) Internodal pathways
Answer: A
R
Page Ref: 5
Learning Obj.: 1.1
D
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.
S
C) Impulses go faster through the AV node.
D) Ventricular conduction slows down.
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