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Questions and Answers
Which of the following best describes the duration of one cardiac cycle when the heart beats 75 times per minute?
Which of the following best describes the duration of one cardiac cycle when the heart beats 75 times per minute?
- 1.5 seconds
- 3.0 seconds
- 0.8 seconds (correct)
- 2.2 seconds
What are the two main periods of the cardiac cycle?
What are the two main periods of the cardiac cycle?
- Atrial systole and ventricular systole
- Atrial diastole and ventricular diastole
- Atrial systole and atrial diastole
- Ventricular systole and ventricular diastole (correct)
What regulates the timing and duration of the ventricular systole and ventricular diastole?
What regulates the timing and duration of the ventricular systole and ventricular diastole?
- Heart chambers
- Heart valves
- Pacemaker cells (correct)
- Major vessels
Approximately what proportion of the cardiac cycle does ventricular systole make up?
Approximately what proportion of the cardiac cycle does ventricular systole make up?
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How does the duration of the cardiac cycle change with increasing heart rate?
How does the duration of the cardiac cycle change with increasing heart rate?
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