Cardiology Quiz

Which chamber of the heart has the thickest wall?

•    a) Left atrium 

•    b) Right atrium 

•    c) Left ventricle 

•    d) Right ventricle 

What is the function of the aortic valve?

•    a) Regulate blood flow into the pulmonary arteries 

•    b) Prevent backflow from the aorta into the left ventricle 

•    c) Maintain blood flow to the right atrium 

•    d) Facilitate oxygen exchange in the lungs 

What are the atrioventricular valves?

•    a) Pulmonary and aortic valves 

•    b) Mitral and tricuspid valves 

•    c) Semilunar valves 

•    d) Pulmonary and mitral valves 

Which structure initiates the electrical impulse that causes the heart to beat? 

•    a) Purkinje fibers 

•    b) AV node 

•    c) SA node 

•    d) Bundle of His 

What occurs during systole? 

•    a) Atria fill with blood 

•    b) Ventricles relax 

•    c) Ventricles contract and pump blood 

•    d) Valves open to allow atrial filling 

Which valve prevents backflow into the right ventricle? 

•    a) Mitral valve 

•    b) Pulmonary valve 

•    c) Aortic valve 

•    d) Tricuspid valve 

What is the role of coronary arteries? 

•    a) Transport oxygenated blood to the lungs 

•    b) Supply oxygen and nutrients to the heart muscle 

•    c) Drain blood from the myocardium to the lungs 

•    d) Pump blood from the atria into ventricles 

Which wave in the ECG represents atrial depolarization? 

•    a) P wave 

•    b) QRS complex 

•    c) T wave 

•    d) U wave 

What is the function of the AV node? 

•    a) Generate impulses faster than the SA node 

•    b) Slow down the impulse to allow ventricular filling 

•    c) Increase heart rate during exercise 

•    d) Maintain blood pressure 

Which vessel transports oxygen-poor blood to the lungs? 

•    a) Pulmonary artery 

•    b) Pulmonary vein 

•    c) Aorta 

•    d) Vena cava