1.3 Electrophysiology of the
Heart Muscle with correct
answers 2025/2026
A physician wants to detect the summation of all the action potentials transmitted by the
cardiac muscle cells through the heart in an noninvasive way. What test would you suggest to
the physician that he/she use?
echocardiogram
electroencephalogram
electrocardiogram
electromyogram - correct answerselectrocardiogram
An ECG
is a direct measurement of mechanical events in the heart
monitors and records the propagation of cardiac action potentials
gives an indication of the force of contraction
a and b only
all of the above - correct answersmonitors and records the propagation of cardiac action
potentials
An ECG analysis can NOT reveal which of the following abnormalities?
hypertension at the aorta
abnormal conduction pathways
an atrophy of the heart
, approximate location of damage
none of the above. The analysis can reveal any of the listed abnormalities. - correct
answershypertension of the aorta
Failure of the SA node to depolarize would result in an ECG
lacking a T wave.
lacking a QRS complex.
lacking a P wave.
that is isoelectric. - correct answerslacking a P wave
From the beginning of the Q wave to the completion of the T wave corresponds to the time
required for the _______________ to ____________________.
atria; contract
atria; contract and begin to relax
ventricles; contract
ventricles; contract and begin to relax - correct answersventricles; contract and begin to relax
Given these structures of the conducting system of the heart:(1) atrioventricular bundle;(2) AV
node;(3) bundle branches;(4) Purkinje fibers;(5) SA node.Choose the arrangements that lists the
structures in the order an action potential passes through them.
2,5,1,3,4
2,5,3,1,4
2,5,4,1,3
5,2,1,3,4
5,2,4,3,1 - correct answers52134
The __________ conducts impulses from the AV node to branches that lead to the Purkinje
fibers.
Heart Muscle with correct
answers 2025/2026
A physician wants to detect the summation of all the action potentials transmitted by the
cardiac muscle cells through the heart in an noninvasive way. What test would you suggest to
the physician that he/she use?
echocardiogram
electroencephalogram
electrocardiogram
electromyogram - correct answerselectrocardiogram
An ECG
is a direct measurement of mechanical events in the heart
monitors and records the propagation of cardiac action potentials
gives an indication of the force of contraction
a and b only
all of the above - correct answersmonitors and records the propagation of cardiac action
potentials
An ECG analysis can NOT reveal which of the following abnormalities?
hypertension at the aorta
abnormal conduction pathways
an atrophy of the heart
, approximate location of damage
none of the above. The analysis can reveal any of the listed abnormalities. - correct
answershypertension of the aorta
Failure of the SA node to depolarize would result in an ECG
lacking a T wave.
lacking a QRS complex.
lacking a P wave.
that is isoelectric. - correct answerslacking a P wave
From the beginning of the Q wave to the completion of the T wave corresponds to the time
required for the _______________ to ____________________.
atria; contract
atria; contract and begin to relax
ventricles; contract
ventricles; contract and begin to relax - correct answersventricles; contract and begin to relax
Given these structures of the conducting system of the heart:(1) atrioventricular bundle;(2) AV
node;(3) bundle branches;(4) Purkinje fibers;(5) SA node.Choose the arrangements that lists the
structures in the order an action potential passes through them.
2,5,1,3,4
2,5,3,1,4
2,5,4,1,3
5,2,1,3,4
5,2,4,3,1 - correct answers52134
The __________ conducts impulses from the AV node to branches that lead to the Purkinje
fibers.
