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WorksheetsCardiac Cycle and Heart
Total questions: 15
Worksheet time: 15mins
What part of the electrical conduction system is labelled A?
SA Node
AV Node
AV Bundle
Bundle Branches
Purkinje Fibers
The pacemaker of the heart is also known as the....
AV node
SA node
Purkinje fibres
Bundle of His
The AV node is located at...
A
B
C
D
The chamber that receives oxygenated blood from the lungs
Right Ventricle
Left Ventricle
Right Atrium
Left Atrium
What number is representing the aorta?
1
2
3
4
8
This triggers contraction in the atria
SA node
AV node
QT node
AV Bundles
This triggers contraction in the ventricle
SA node
AV node
QT node
AV Bundles
What is going on in the heart during the T-wave
SA node triggers depolarization in atria
AV node triggers depolarization in ventricle, the main pumpung action
Delay caused by the SA node
Repolarization of the ventricle
What fibres allow the ventricles to contract?
SA
AV
Purkinje
Bundle of His
What is another name for a mitral valve?
bicuspid
tricuspid
aortic
pulmonary
Blood enters the right atrium through
pulmonary veins
vena cavaes
pulmonary arteries
aorta
The QRS-wave correlates with which event?
atrium contraction /signals moving from SA node to AV node
ventricle contraction
ventricle repolarization
both atrial and ventricle contraction
What is the primary function of the atrioventricular (AV) node in the cardiac cycle?
To initiate the heartbeat
To delay the electrical impulse before it passes to the ventricles
To contract the atria
To pump blood into the aorta
During which phase of the cardiac cycle does the heart muscle relax and allow the chambers to fill with blood?
Systole
Diastole
Isovolumetric contraction
Isovolumetric relaxation
Which of the following best describes the role of the sinoatrial (SA) node in the heart?
It acts as the heart's natural pacemaker
It delays the electrical impulse to the ventricles
It contracts the ventricles
It pumps blood into the pulmonary artery
