Chapter 01 - 9e
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) The inherent rate of the SA node is ________ bpm. 1)
A) 40-60 B) 100-120 C) 60-100 D) 30-60
2) The inherent rate of the AV junction is ________ bpm. 2)
A) 60-100 B) 20-40 C) 40-60 D) 100-120
3) The inherent rate of the ventricle is ________ bpm. 3)
A) 100-120 B) 20-40 C) 40-60 D) 60-100
4) The built-in rate of each of the three major areas of the conduction system is referred to as the 4)
________ rate.
A) fast B) escape C) heart D) inherent
5) What term is used to refer to the process of electrical discharge and the flow of electrical 5)
activity?
A) Polarized B) Depolarization
C) Polarization D) Repolarization
6) If polarizing is considered the ready state, then ________ would be considered the recovery 6)
state.
A) repolarization B) discharge
C) polarization D) depolarization
7) After leaving the area of the AV node, impulses go through the ________ to reach the right and 7)
left bundle branches.
A) SA node B) AV junction
C) Purkinje fibers D) Bundle of His
8) Part of the parasympathetic branch of the autonomic nervous system is the ________ nerve. 8)
A) aortic B) vagus C) pericardial D) coronary
9) When stimulated, the ________ branch of the nervous system increases heart rate, AV 9)
conduction, and irritability.
A) sympathetic B) pacemaker
C) parasympathetic D) inherent
10) Which cardiac cells are responsible for initiating and conducting pacemaker impulses? 10)
A) Electrical cells B) Mechanical cells
C) Motor cells D) Atrioventricular cells
11) Which is the normal pacemaker of the heart? 11)
A) AV node B) Ventricle C) SA node D) AV junction
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,12) Which of the following is NOT a part of the normal cardiac conduction system? 12)
A) Coronary sinus B) Purkinje Fibers
C) AV node D) Internodal pathways
13) What is the term for the fail-safe mechanism that allows a lower pacemaker to take over when a 13)
higher site fails?
A) Polarization B) Irritability
C) Escape D) AV conduction
14) Which of the following best explains the mechanism called irritability? 14)
A) The ventricles repolarize before they are ready.
B) The normal pacemaker changes its inherent rate.
C) A lower pacemaker site speeds up to take control of the heart.
D) The normal pacemaker slows down and gives up control.
15) Which of the following does NOT happen when the sympathetic branch is stimulated? 15)
A) The heart becomes more irritable.
B) Heart rate increases.
C) Ventricular conduction slows down.
D) Impulses go faster through the AV node.
2
, Answer Key
Testname: UNTITLED1
1) C
2) C
3) B
4) D
5) B
6) A
7) D
8) B
9) A
10) A
11) C
12) A
13) C
14) C
15) C
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MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) The inherent rate of the SA node is ________ bpm. 1)
A) 40-60 B) 100-120 C) 60-100 D) 30-60
2) The inherent rate of the AV junction is ________ bpm. 2)
A) 60-100 B) 20-40 C) 40-60 D) 100-120
3) The inherent rate of the ventricle is ________ bpm. 3)
A) 100-120 B) 20-40 C) 40-60 D) 60-100
4) The built-in rate of each of the three major areas of the conduction system is referred to as the 4)
________ rate.
A) fast B) escape C) heart D) inherent
5) What term is used to refer to the process of electrical discharge and the flow of electrical 5)
activity?
A) Polarized B) Depolarization
C) Polarization D) Repolarization
6) If polarizing is considered the ready state, then ________ would be considered the recovery 6)
state.
A) repolarization B) discharge
C) polarization D) depolarization
7) After leaving the area of the AV node, impulses go through the ________ to reach the right and 7)
left bundle branches.
A) SA node B) AV junction
C) Purkinje fibers D) Bundle of His
8) Part of the parasympathetic branch of the autonomic nervous system is the ________ nerve. 8)
A) aortic B) vagus C) pericardial D) coronary
9) When stimulated, the ________ branch of the nervous system increases heart rate, AV 9)
conduction, and irritability.
A) sympathetic B) pacemaker
C) parasympathetic D) inherent
10) Which cardiac cells are responsible for initiating and conducting pacemaker impulses? 10)
A) Electrical cells B) Mechanical cells
C) Motor cells D) Atrioventricular cells
11) Which is the normal pacemaker of the heart? 11)
A) AV node B) Ventricle C) SA node D) AV junction
1
,12) Which of the following is NOT a part of the normal cardiac conduction system? 12)
A) Coronary sinus B) Purkinje Fibers
C) AV node D) Internodal pathways
13) What is the term for the fail-safe mechanism that allows a lower pacemaker to take over when a 13)
higher site fails?
A) Polarization B) Irritability
C) Escape D) AV conduction
14) Which of the following best explains the mechanism called irritability? 14)
A) The ventricles repolarize before they are ready.
B) The normal pacemaker changes its inherent rate.
C) A lower pacemaker site speeds up to take control of the heart.
D) The normal pacemaker slows down and gives up control.
15) Which of the following does NOT happen when the sympathetic branch is stimulated? 15)
A) The heart becomes more irritable.
B) Heart rate increases.
C) Ventricular conduction slows down.
D) Impulses go faster through the AV node.
2
, Answer Key
Testname: UNTITLED1
1) C
2) C
3) B
4) D
5) B
6) A
7) D
8) B
9) A
10) A
11) C
12) A
13) C
14) C
15) C
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