18. The Heart

Cardiac Cycle

Multiple Choice
The QRS complex on the ECG represents which of the following events in the cardiac cycle?
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Multiple Choice
Which of the following are considered events of the cardiac cycle?
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Multiple Choice
Which events occur during the atrial contraction and ventricular filling phase of the cardiac cycle?
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Multiple Choice
The shutting of the semilunar valves occurs during which phase of the cardiac cycle?
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Multiple Choice
During which phase of the cardiac cycle is the heart filled with blood?
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Multiple Choice
Which of the following statements about the cardiac cycle is true?
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Multiple Choice
Which event of the cardiac cycle occurs when systolic blood pressure is measured?
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Multiple Choice
In the cardiac cycle, the opening and closing of the heart valves is primarily caused by which factor?
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Multiple Choice
Which of the following is not true for ventricular systole?
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Multiple Choice
At what point during the cardiac cycle does the atrioventricular (AV) valve close?
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Multiple Choice
During which following phase (or phases) of the cardiac cycle is the blood volume in the ventricles constant?
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Multiple Choice
In the cardiac cycle, when is the S2 heart sound heard?
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Multiple Choice
During the isovolumetric relaxation phase of the cardiac cycle, which of the following occurs?
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Multiple Choice
Which is the correct sequence of events in the cardiac cycle?
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Multiple Choice
The second heart sound (the 'dup' of 'lub-dup') is caused by the __________.
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