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WorksheetsLO 2
Total questions: 8
Worksheet time: 5mins
Which of the following occurs during ventricular systole?
Atria contract
Ventricles fill with blood
Semilunar valves open
AV valves open
Which phase of the cardiac cycle corresponds to relaxation of heart chambers?
Atrial systole
Ventricular systole
Isovolumetric contraction
Diastole
During which phase are all heart valves closed?
Ventricular ejection
Atrial systole
Isovolumetric contraction
Ventricular filling
The "lub" sound (first heart sound) is associated with:
Closing of semilunar valves
Opening of AV valves
Closing of AV valves
Atrial contraction
Isovolumetric relaxation occurs after semilunar valves close and before AV valves open.
True
False
Atrial systole contributes to the final 20–30% of ventricular filling.
True
False
The phase during which blood is ejected from the ventricles is called the (a) phase.
The (a) phase is marked by contraction with no volume change.
