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15 Cards in this Set
- Front
- Back
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Which of the following best explains the mechanism called irritability?
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A Lower pacemaker site speeds up to take control of the heart
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What term is used to refer to the process of electrical discharge and the flow of electrical activity?
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Depolarization
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The inherent rate of the ventricle is ____ bpm.
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20-40
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Part of the parasympathetic branch of the autonomic nervous system is the ____ nerve?
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Vagus
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What is the term for the fail-safe mechanism that allows a lower pacemaker to take over when a higher site fails?
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Escape
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Which cardiac cells are responsible for initiating and conducting pacemaker impulses?
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Electrical cells
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When stimulated, the ____ branch of the nervous system will increase heart rate, AV conduction and irritability?
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Sympathetic
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The inherent rate of the AV junction is ___ bpm.
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40-60
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The inherent rate of the SA node is ____ bpm?
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60-100
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Which of the following is NOT a part of the normal cardiac conduction system?
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Coronary sinus
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After leaving the area of the AV node, impulses go through the ____ to reach the right and left bundle branches.
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Bundle of His
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Which is the normal pacemaker of the heart?
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SA node
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The built-in rate of each of the three major areas of the conduction system is referred to as the ___ rate.
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Inherent
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If polarizing is considered the ready state, then _____ would be considered the recovery state.
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repolarization
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Which of the following does NOT happen when the sympathetic branch is stimulated?
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Ventricular conduction slows down
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