Edexcel IAL Heart and Circulation Quiz

How many chambers does the heart have?

• Two

• Three

• Four

• Five

What is the function of the atria in the heart?

• Pump blood to the lungs

• Receive blood into the heart from the veins

• Prevent backflow of blood into the ventricles

• Contract during ventricular systole

What is the purpose of the semilunar valves?

• Prevent backflow of blood from the arteries into the ventricles

• Prevent backflow of blood from the ventricles into the atria

• Control blood flow to the lungs

• Regulate blood pressure

In which circulation does blood first enter the heart into the right atrium?

• Pulmonary circulation

• Systemic circulation

• Coronary circulation

• Hepatic circulation

Which vessel carries blood from the right ventricle to the lungs?

• Pulmonary artery

• Pulmonary vein

• Aorta

• Vena cava

What prevents blood from flowing back from the ventricles into the atria?

• Semilunar valves

• Atrioventricular valves

• Pulmonary artery

• Aorta

Why are mammals described as having a 'double circulatory system'?

• Because they have two hearts

• Because blood flows through the heart twice in each circulation

• Because they have two types of blood cells

• Because they have two aortas

What happens during the cardiac diastole?

• Atria contract

• Ventricles contract

• Elastic recoil of the heart lowers pressure

• Blood is forced out of the atria

What closes during cardiac diastole to prevent backflow of blood?

• Semilunar valves in the aorta and pulmonary arteries

• Atrioventricular valves

• Pulmonary vein

• Vena cava

What occurs during ventricular systole?

• Atrioventricular valves open

• Semilunar valves close

• Ventricles relax

• Blood leaves the ventricles