8/11/2026, 1:11:03 PM Chapter 20 Assessment Questions.pdf Chapter 20 Assessment Questions.pdf
Chapter 20 Assessment Questions
Terms in this set (52)
Original
Cardiac cells are connective, which means that they can transfer actions potentials from one cell to
the next via gap junctions.
True
Cardiac cells are also auto rhythmic. This means that they are self-excitatory and can generate their
own action potentials.
True
The AV node acts as a natural pacemaker for the heart.
False
A normal resting stroke volume is around 70-mL.
True
The AV node stimulates the contraction of the SA node, which in turn stimulates the contraction of the
ventricles.
False
Which of the following has the fastest natural rhythm?
The SA node
Which of the following has the slowest natural rhythm?
%
The Ventricles
Which of the following ECG waves represents Ventricular excitation/depolarization?
QRS
Which of the following ECG waves represents the end of ventricular excitation?
T
An ECG measures the sequence of depolarizations and repolarizations during a heartbeat.
True
An electrocardiogram can help determine all of the following except:
a cause of chest pain
if a heart attack has occurred
if the heart has enlarged
if the conduction pathway is functioning normally
all of these choices can be determined during an ECG
Chapter 20 Assessment Questions.pdf Chapter 20 Assessment Questions.pdf Chapter 20 Assessment Questions.pdf
, 8/11/2026, 1:11:03 PM Chapter 20 Assessment Questions.pdf Chapter 20 Assessment Questions.pdf
Which wave is matched correctly with the heart's activity?
S-T segment - the ventricles are depolarized
What occurs after the QRS phase of the ECG?
the atria contract.
the atria relax.
the ventricles contract.
the ventricles relax.
diastole occurs.
the ventricles contract.
%
This ECG most likely represents:
ventricular tachycardia.
ventricular fibrillation.
atrial fibrillation.
heart block.
bradycardia.
atrial fibrillation.
Chapter 20 Assessment Questions.pdf Chapter 20 Assessment Questions.pdf Chapter 20 Assessment Questions.pdf
Chapter 20 Assessment Questions
Terms in this set (52)
Original
Cardiac cells are connective, which means that they can transfer actions potentials from one cell to
the next via gap junctions.
True
Cardiac cells are also auto rhythmic. This means that they are self-excitatory and can generate their
own action potentials.
True
The AV node acts as a natural pacemaker for the heart.
False
A normal resting stroke volume is around 70-mL.
True
The AV node stimulates the contraction of the SA node, which in turn stimulates the contraction of the
ventricles.
False
Which of the following has the fastest natural rhythm?
The SA node
Which of the following has the slowest natural rhythm?
%
The Ventricles
Which of the following ECG waves represents Ventricular excitation/depolarization?
QRS
Which of the following ECG waves represents the end of ventricular excitation?
T
An ECG measures the sequence of depolarizations and repolarizations during a heartbeat.
True
An electrocardiogram can help determine all of the following except:
a cause of chest pain
if a heart attack has occurred
if the heart has enlarged
if the conduction pathway is functioning normally
all of these choices can be determined during an ECG
Chapter 20 Assessment Questions.pdf Chapter 20 Assessment Questions.pdf Chapter 20 Assessment Questions.pdf
, 8/11/2026, 1:11:03 PM Chapter 20 Assessment Questions.pdf Chapter 20 Assessment Questions.pdf
Which wave is matched correctly with the heart's activity?
S-T segment - the ventricles are depolarized
What occurs after the QRS phase of the ECG?
the atria contract.
the atria relax.
the ventricles contract.
the ventricles relax.
diastole occurs.
the ventricles contract.
%
This ECG most likely represents:
ventricular tachycardia.
ventricular fibrillation.
atrial fibrillation.
heart block.
bradycardia.
atrial fibrillation.
Chapter 20 Assessment Questions.pdf Chapter 20 Assessment Questions.pdf Chapter 20 Assessment Questions.pdf
