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Physiology Quiz -
Cardiac Cycle - Part 4
The cardiac cycle refers to the sequence of events that takes place from one heart beat to the next. A full understanding of the cardiac cycle requires thorough examination of atrial systole, atrial diastole, ventricular systole, ventricular diastole, atrial and ventricular volume changes during the cycle, electrical events (depolarization and repolarization) of atria and ventricular myocytes, heart sounds associated with turbulent blood flow caused by the closure of semilunar valves, as well as hydrostatic blood pressure changes within the atria, ventricles, and the aorta. Test you basic understanding of the cardiac cycle by taking this simple quiz.
(1)   When the heart rate increases, the duration of the systolic phase of the cardiac cycle __________.
(2)   When the heart rate increases, the duration of the diastolic phase of the cardiac cycle __________.
(3)   Considering a typical electrocardiogram (ECG), the P wave is associated with:
(4)   Considering a typical electrocardiogram (ECG), the QRS complex is associated with:
(5)   Considering a typical electrocardiogram (ECG), the T wave is associated with:
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Posted: Wednesday, March 23, 2016