BAMC Telemetry Test Questions With 100%Verified AnswersA+GRADED
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Course
BAMC Telemetry
Institution
BAMC Telemetry
BAMC Telemetry Test Questions With 100%Verified AnswersA+GRADED
Action potential - correct answer...The graphic representation of cellular electrical events
Describes the changes in intracardiac voltage that lead to impulse formation and conduction and, ultimately, to cardiac contraction
Aut...
BAMC Telemetry Test Questions With
100%Verified AnswersA+GRADED
Action potential - correct answer...✔✔The graphic representation of cellular electrical
events
Describes the changes in intracardiac voltage that lead to impulse formation and
conduction and, ultimately, to cardiac contraction
Automaticity - correct answer...✔✔The ability to initiate impulses spontaneously
Conductivity - correct answer...✔✔The ability to conduct an impulse along the cell
membrane
Contractility - correct answer...✔✔The ability to contract in response to a stimulus
Depolarization - correct answer...✔✔A change in the resting electrical state of the
cardiac cell
The inside of the cell becomes more positive and impulse is spread through the heart
Excitability - correct answer...✔✔The ability of cells to respond to a stimulus
Refractory period - correct answer...✔✔Absolute
Relative
Absolute refractory period - correct answer...✔✔The cardiac cell is unable to accept or
respond to a stimulus
Relative refractory period - correct answer...✔✔A stronger than normal impulse may
stimulate the cardiac cell to depolarize
Repolarization - correct answer...✔✔Return of the cardiac cell to the resting membrane
state
The inside of the cell becomes more negative
Resting membrane potential - correct answer...✔✔The electrical charge across the
cardiac cell membrane between impulses
About -70 mV
Threshold - correct answer...✔✔The electrical level at which the cell will continue to
depolarize without additional stimulus
About -60 mV
AGRADESOLUTIONS
, Sinoatrial node (SA node) - correct answer...✔✔Located high in the right atrium, near
the junction of the superior vena cava
It is the primary pacemaker of the heart with normal rate automaticity of 60-100 bpm
Internodal atrial pathways - correct answer...✔✔Conduct the impulse from the SA node
through the right atrium musculature to the AV node
Three tracts
- Bachmann's (anterior, fast tract)
- Wenchkebach's (middle)
- Thorel's (posterior, slow tract)
Atrioventricular node (AV node) - correct answer...✔✔Located low in the right atrium,
adjacent to the inter-atrial septum
Delays impulse from atria to allow atrial contraction and synchronizes atrial contribution
to ventricular pumping
The impulse is then sent to the ventricles via the bundle of His, normally the AV node is
the only structure that is capable to conducting impulses to the ventricles
Can serve as a backup pacemaker
Inherent rate of automaticity is 40-60 bpm
Bundle of His - correct answer...✔✔Arises from the AV node and conducts impulse to
bundle branch system
Bundle branch system - correct answer...✔✔Pathways that arise from the Bundle of
His
Composed of right bundle branch
Right bundle branch - correct answer...✔✔A direct continuation of the bundle of His
Transmits impulse down right side of the inter ventricular septum to the myocardium of
the right ventricle
Left bundle branch - correct answer...✔✔Separates into 3 fascicles
- Left posterior fascicle
- Left anterior fascicle
- Septal fascicle
Left posterior fascicle - correct answer...✔✔Transmits impulse over posterior and
inferior endocardial surface of the left ventricle
Left anterior fascicle - correct answer...✔✔Transmits impulse over anterior and
superior endocardial surfaces of the left ventricle
Purkinje fibers - correct answer...✔✔Arises from distal portion of bundle branches,
transmits impulses into subendocardial layers of both ventricles
Provides for the depolarization
AGRADESOLUTIONS
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