Cardiac Cycle Quiz

What is the term for the stage when both the atria and the ventricles are relaxing?

• Ventricular systole

• Atrial systole

• Diastole

• Atrial diastole

What causes the atrioventricular valves to open?

• Contraction of the ventricles

• Higher pressure in the ventricles compared to the atria

• Relaxation of the atria

• Higher pressure in the atria compared to the ventricles

What is the function of the semilunar valves?

• To prevent backflow of blood into the atria

• To regulate the blood flow between the ventricles and the arteries

• To increase the pressure in the atria

• To control the opening and closing of the atrioventricular valves

What is the formula for calculating the cardiac output?

• Heart rate + Stroke volume

• Heart rate - Stroke volume

• Heart rate x Stroke volume

• Heart rate / Stroke volume

During ventricular systole, what causes the atrioventricular valves to close?

• Higher pressure in the ventricles compared to the atria

• Contraction of the atria

• Higher pressure in the atria compared to the ventricles

• Relaxation of the ventricles

What happens to the volume of the ventricles during atrial systole?

• It increases

• It fluctuates

• It remains the same

• It decreases

What causes the semilunar valves to open?

• Contraction of the atria

• Higher pressure in the atria compared to the ventricles

• Higher pressure in the ventricles compared to the atria

• Relaxation of the ventricles

What is the cardiac output?

• The volume of blood that enters the atria during atrial systole

• The pressure in the ventricles during diastole

• The number of heartbeats in one minute

• The volume of blood that leaves the heart every minute

What causes the atrioventricular valves to open?

• Higher pressure in the ventricles compared to the atria

• Contraction of the ventricles

• Higher pressure in the atria compared to the ventricles

• Relaxation of the atria

What happens to the pressure in the ventricles during ventricular systole?

• It decreases

• It increases

• It remains the same

• It fluctuates