Podcast
Questions and Answers
What occurs during the atrial systole phase of the cardiac cycle?
What occurs during the atrial systole phase of the cardiac cycle?
What is the approximate blood volume in the ventricles at the end of atrial contraction?
What is the approximate blood volume in the ventricles at the end of atrial contraction?
What happens to ventricular pressure during the isometric ventricular contraction phase?
What happens to ventricular pressure during the isometric ventricular contraction phase?
When do the semilunar valves open in the cardiac cycle?
When do the semilunar valves open in the cardiac cycle?
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What occurs regarding blood volume during the ventricular systole phase?
What occurs regarding blood volume during the ventricular systole phase?
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What does the end-systolic volume refer to in the cardiac cycle?
What does the end-systolic volume refer to in the cardiac cycle?
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What is indicated by the stroke volume in the context of heart function?
What is indicated by the stroke volume in the context of heart function?
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What is a significant change that occurs at the end of atrial contraction?
What is a significant change that occurs at the end of atrial contraction?
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Study Notes
Atrial Ejection of Blood
- Blood is propelled from the atria into the ventricles
- Pressure within the ventricles increases
- Blood volume increases to 130ml
Atrial Systole Conclusion
- Bicuspid and tricuspid valves close
- Atrial pressure decreases
- Ventricular blood volume increases further to 130ml
Isometric Ventricular Contraction
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All valves (atrioventricular and semilunar) are closed
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Ventricular pressure rises
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Ventricular pressure surpasses arterial pressure
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Semilunar valves open
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Ventricles pump blood into aorta and pulmonary artery
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Ventricular blood volume decreases to 50ml
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Ventricular pressure remains higher than arterial pressure throughout ventricular systole
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Description
This quiz covers key stages of the cardiac cycle, including atrial ejection of blood, atrial systole, and isometric ventricular contraction. Understand how blood moves through the heart and the changes in pressure and volume during these phases. Test your knowledge of these essential cardiac processes.
