Understanding the Cardiac Cycle

Which valve is located on the right side and separates the atrium from the ventricle?

• Mitral valve

• Tricuspid valve

• Aortic valve

• Pulmonary valve

What are the two main phases of the cardiac cycle?

• Systole and Diastole

• Diastole and Tricuspid

• Atrial and Ventricular

• Pulmonary and Aortic

During systole, what happens to the ventricles?

• They dilate

• They relax

• They close

• They contract

During which phase of the cardiac cycle is blood passively flowing from the atria to the ventricles?

• Neither phase

• Both phases

• Systole

• Diastole

What does the top number in a blood pressure reading represent?

• Diastolic pressure

• Mitral pressure

• Systolic pressure

• Pulmonary pressure

What causes the 'lub' sound in the heart?

• Contraction of the atria

• Closing of the atrioventricular valves

• Opening of the semilunar valves

• Relaxation of the ventricles

What is the role of the semilunar valves during systole?

• They dilate to increase blood flow

• They contract along with the ventricles

• They open to allow blood to flow into the arteries

• They close to prevent blood from entering the ventricles

Which valve closes slightly earlier causing the splitting of the S2 sound?

• Aortic valve

• Mitral valve

• Tricuspid valve

• Pulmonary valve

Which condition is true during diastole?

• The semilunar valves are open

• The atrioventricular valves are closed

• Blood flows through the mitral valve

• The tricuspid valve is closed

What happens to the atrioventricular valves during diastole?

• They open to allow blood flow into the ventricles

• They contract

• They close to prevent backflow

• They dilate