18. The Heart

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 ________.

What is the cardiac output of a person with a heart rate of 60 beats per minute (bpm) and a stroke volume of 90 mL?

The QRS complex on the ECG represents which of the following events in the cardiac cycle?

Which of the following are considered events of the cardiac cycle?

Which events occur during the atrial contraction and ventricular filling phase of the cardiac cycle?

The shutting of the semilunar valves occurs during which phase of the cardiac cycle?

During which phase of the cardiac cycle is the heart filled with blood?

Which of the following statements about the cardiac cycle is true?

Which event of the cardiac cycle occurs when systolic blood pressure is measured?

Which of the following is not true for ventricular systole?

At what point during the cardiac cycle does the atrioventricular (AV) valve close?

During the isovolumetric relaxation phase of the cardiac cycle, which of the following occurs?