18. The Heart

During the cardiac cycle, which mechanical event immediately follows atrial repolarization?

Which factor accounts for the movement of the heart valves during the cardiac cycle?

At what point in the cardiac cycle does the semilunar valve open?

What event occurs in the heart as the atrioventricular (AV) valves are closing?

The second heart sound is heard during which phase of the cardiac cycle?

During the cardiac cycle, which valves close when their cusps fill with blood and are forced shut to prevent backflow into the ventricles?

During what phase of the cardiac cycle does blood flow from the ventricles into the pulmonary trunk and aorta?

How is stroke volume calculated in the context of the cardiac cycle?

Which of the following statements is not true regarding ventricular systole?

During which phase of the cardiac cycle is ventricular pressure greater than aortic pressure?

An increase in stroke volume is a result of which of the following?

Which event in the cardiac cycle is most directly responsible for producing the first heart sound (S1)?

Which of the following would decrease stroke volume?

During which phase of the cardiac cycle are all four heart valves open?

The cardiac cycle includes all the events that occur during one complete ________.