The Cardiac Cycle Quiz

What is the term for the contraction of the heart?

• Systole

• Diastole

• Atrial systole

• Ventricular diastole

During which phase do the atrioventricular (AV) valves open?

• Diastole

• None of the above

• Ventricular systole

• Atrial systole

What happens to the ventricular volume during ventricular systole?

• Increases

• Decreases

• Remains constant

• Fluctuates

Which valves open when the pressure in the ventricles exceeds that in the aorta?

• Mitral valve

• Tricuspid valve

• Semilunar valves

• Atrioventricular valves

What is the primary function of heart valves?

• To decrease heart rate

• To stop blood flowing backwards

• To increase blood pressure

• To increase heart rate

What is the term for the relaxation of the heart?

• Atrial systole

• Diastole

• Systole

• Ventricular systole

During which phases do the semilunar (SL) valves close?

• Ventricular systole

• Diastole

• It depends on the heart rate

• Atrial systole

What causes the atrioventricular (AV) valves to close?

• Higher pressure in the pulmonary artery

• Higher pressure in the ventricles

• Higher pressure in the atria

• Higher pressure in the aorta

What is the sequence of events in one heart beat called?

• Cardiac cycle

• Respiratory cycle

• Circulatory cycle

• Vascular cycle

What happens to the pressure in the ventricles during diastole?

• Increases

• Decreases

• Remains constant

• Fluctuates