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WorksheetsCardiovascular - Heart
Total questions: 12
Worksheet time: 9mins
How much blood does the human heart pump through it per minute (on average)?
1/2 gallon
1 gallon
1 and 1/2 gallons
3 gallons
Which is a function of the pericardium?
Prevents overfilling of the heart.
Forms a continuous lining with the vessels attached to the heart.
It is the muscle layer of the heart.
Signals the heart to beat.
_____ conducts blood away from the heart.
Capillaries
Veins
Arteries
Atria
When the ventricles contract, the pressure inside the chamber opens the (a) valves.
During embryonic development, about 1% of cardiac muscle fibers become self excitable. Clusters of these cells are called ____.
Purkinje fibers
nodes
atrioventricular bundle
septum
The largest wave in an EKG is known as....
T wave
QRS wave
P wave
U wave
In an EKG, the QRS wave represents...
atrial depolarization
ventricular repolarization
fibrillation
ventricular depolarization
In the sequence of excitation of the heart, which structure generates impulses about 75 times a minute?
Atrioventricular bundle
Atrioventricular node
Sinoatrial node
Bundle branches
In the cardiac cycle, the ventricles expand to hold the blood. At one point, the ventricles have all the blood they can hold before they contract. What is this called?
End diastolic volume
End systolic volume
Isovolumetric relaxation
Atrial systole
Ventricular repolarization is represented by which wave on the EKG?
U wave
P wave
QRS wave
T wave
The cardiac cycle represents ____ and ____ changes taking place in the heart.
pressure
size
tissue
volume
In a heartbeat, you hear a lub, dub sound.
What are you hearing during the lub?
semilunar valves closing
semilunar valves opening
atrioventricular valves closing
atrioventricular valves opening
