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Worksheets11/5 Practice Quiz
Total questions: 15
Worksheet time: 13mins
During which part of the EKG does the AV node delay occur?
Before the P wave
Between the P wave and QRS complex
During the QRS complex
After the T wave
The S1 heart sound (“lub”) occurs at which point in the cardiac cycle?
During the P wave
During the QRS complex
During the T wave
Just before atrial depolarization
Which portion of the conduction system directly causes ventricular contraction?
AV node
Bundle of His
Purkinje fibers
SA node
During ventricular systole, which heart valves are open?
Mitral and tricuspid
Pulmonary and aortic
All valves
None of the valves
The T wave on an EKG corresponds to which physiological process?
Atrial contraction
Atrial relaxation
Ventricular contraction
Ventricular relaxation
Which event occurs immediately after the T wave?
Ventricular contraction
Atrial contraction
Ventricular contraction
AV node delay
Which event would most directly cause the S2 (“dub”) heart sound?
Closure of atrioventricular valves
Closure of semilunar valves
Contraction of the ventricles
Contraction of the atria
Which of the following structures is active during the P wave?
Atrioventricular node
Bundle of His
Purkinje fibers
Sinoatrial node
Label the following components of an EKG
Organize these options in the correct part of the EKG where they occur.
Atrial contraction
Sinoatrial node fires
S1 Heart Sound
Systole
Ventricular contraction
Purkinje fibers fire
Semilunar valves OPEN
Diastole
S2 Heart Sound
Ventricular relaxation
Semilunar valves CLOSE
Atrioventricular node delays signal
An abnormally high heartbeat (>100bpm) is known as (a) .
An abnormally low heartbeat (<60bpm) is known as (a) .
The sinoatrial node is known as the heart's natural (a) .
The ventricles are stimulated to contract when the (a) fibers fire.
True or False: a heart rate of 150bpm after running a 5k race would be considered tachycardia.
True
False
