7 Questions
During which phase of the cardiac cycle does the heart fill with blood?
Relaxation (diastole)
Where is the sinoatrial node located?
In the superior-lateral wall of the right atrium
What is the main function of the atria in the cardiac cycle?
To act as primer pumps for the ventricles
What occurs during systole in the cardiac cycle?
Contraction of the heart
Which structure conveys venous blood from the upper half of the body to the right atrium?
Superior vena cava (SVC)
What initiates each cardiac cycle by generating an action potential in the sinoatrial node?
Spontaneous peacemaker cells
What is the function of allowing a delay of more than 0.1 second for the passage of cardiac impulse from atria to ventricles?
To allow atrial contraction before ventricular contraction
This quiz covers the changes in blood flow in the atria and ventricles of the heart. Learn about the percentages of blood flow and the impact of atrial contraction on ventricular filling.
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