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WorksheetsElectrical System of the Heart
Total questions: 10
Worksheet time: 6mins
The electrical impulse that initiates a heartbeat is generated in which structure?
Atrioventricular (AV) node
Sinoatrial (SA) node
Atria
Ventricles
Which of the following is the correct sequence of the normal conduction pathway of the heart?
AV node → SA node → Bundle of His → Purkinje fibers
SA node → AV node → Bundle of His → Purkinje fibers
Bundle of His →SA node → AV node → Purkinje fibers
AV node → SA node → Purkinje fibers → Bundle of His
The PR interval on an electrocardiogram (ECG) represents the time taken for the electrical impulse to travel from the:
SA node to the AV node
AV node to the ventricles
Atria to the ventricles
Ventricles to the atria
The QRS complex on an ECG represents:
Atrial depolarization
Atrial repolarization
Ventricular depolarization
Ventricular repolarization
The T wave on an ECG represents:
Atrial depolarization
Atrial repolarization
Ventricular depolarization
Ventricular repolarization
Which structure is responsible for transmitting the electrical impulse from the atria to the ventricles?
AV node
SA node
Bundle of His
Purkinje fibers
The normal heart rate range is typically between:
40-60 beats per minute
60-100 beats per minute
100-160 beats per minute
160-200 beats per minute
Complete heart block occurs when:
The SA node fails to fire
The AV node fails to transmit the electrical impulse
The ventricles contract before the atria
There is a blockage in the coronary arteries
Which term describes the coordinated contraction of the atria followed by the ventricles?
Diastole
Systole
Cardiac cycle
Ventricular filling
Which property of conduction in the heart describes cardiac muscle cells' ability to respond to an electrical impulse?
automaticity
