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Questions and Answers
During which phase of ventricular filling does the AV valve open?
During which phase of ventricular filling does the AV valve open?
- Ventricular systole
- Atrial contraction
- Ventricular diastole (correct)
- Diastasis
What is the term for the volume of blood in the ventricles at the end of the filling period?
What is the term for the volume of blood in the ventricles at the end of the filling period?
- Stroke volume
- End-diastolic volume (correct)
- End-systolic volume
- Cardiac output
What percentage of each cardiac cycle at rest does systole last in the atria?
What percentage of each cardiac cycle at rest does systole last in the atria?
- 90%
- 40%
- 10% (correct)
- 80%
Which valve closes during ventricular systole to prevent the backward flow of blood from the ventricle into the atrium?
Which valve closes during ventricular systole to prevent the backward flow of blood from the ventricle into the atrium?
During which phase of ventricular filling is the atrium contracting to push the last 25% of blood into the ventricles?
During which phase of ventricular filling is the atrium contracting to push the last 25% of blood into the ventricles?
What is the typical pressure range that ventricular pressure climbs towards during ventricular systole?
What is the typical pressure range that ventricular pressure climbs towards during ventricular systole?
What is the name of the period when ventricular pressure exceeds aortic pressure and the aortic valve opens?
What is the name of the period when ventricular pressure exceeds aortic pressure and the aortic valve opens?
What is the approximate volume of blood that remains in the ventricle following contraction?
What is the approximate volume of blood that remains in the ventricle following contraction?
What causes the closure of the aortic valve?
What causes the closure of the aortic valve?
During which phase are both the aortic and AV valves closed with no change in ventricular volume?
During which phase are both the aortic and AV valves closed with no change in ventricular volume?
What property of arterial walls allows for continuous blood flow to the tissues despite the heart pumping blood intermittently?
What property of arterial walls allows for continuous blood flow to the tissues despite the heart pumping blood intermittently?
What happens to the arteries during diastole?
What happens to the arteries during diastole?
What is the primary function of the electrocardiogram?
What is the primary function of the electrocardiogram?
During which phase of the cardiac cycle is the heart completely depolarized?
During which phase of the cardiac cycle is the heart completely depolarized?
What is the term for a rapid heart rate?
What is the term for a rapid heart rate?
During which phase of the cardiac cycle do the ventricles relax and fill with blood?
During which phase of the cardiac cycle do the ventricles relax and fill with blood?
What is the term for a slow heart rate?
What is the term for a slow heart rate?
During which phase of the cardiac cycle do the ventricles contract and pump blood out of the heart?
During which phase of the cardiac cycle do the ventricles contract and pump blood out of the heart?
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