Cardiovascular System MCQs

  1. Which chamber of the heart receives deoxygenated blood from the body?
    a) Left atrium
    b) Right atrium
    c) Left ventricle
    d) Right ventricleAnswer: b) Right atrium
  2. What is the primary function of the aortic valve?
    a) To prevent backflow of blood into the left atrium
    b) To regulate blood flow from the right ventricle into the pulmonary artery
    c) To prevent backflow of blood into the left ventricle
    d) To regulate blood flow from the left atrium into the left ventricleAnswer: c) To prevent backflow of blood into the left ventricle
  3. Which artery is the primary vessel supplying oxygenated blood to the brain?
    a) Carotid artery
    b) Subclavian artery
    c) Aortic artery
    d) Femoral arteryAnswer: a) Carotid artery
  4. What is the role of the sinoatrial (SA) node in the heart?
    a) To conduct electrical impulses to the ventricles
    b) To initiate the heartbeat and set the pace for the heart rate
    c) To regulate blood pressure
    d) To contract the ventriclesAnswer: b) To initiate the heartbeat and set the pace for the heart rate
  5. Which blood vessel carries oxygenated blood from the lungs to the left atrium?
    a) Pulmonary artery
    b) Pulmonary vein
    c) Aorta
    d) Superior vena cavaAnswer: b) Pulmonary vein
  6. Which type of blood vessel is responsible for exchanging gases, nutrients, and wastes with tissues?
    a) Arteries
    b) Veins
    c) Capillaries
    d) ArteriolesAnswer: c) Capillaries
  7. Which component of blood is primarily responsible for clotting?
    a) Red blood cells
    b) White blood cells
    c) Platelets
    d) PlasmaAnswer: c) Platelets
  8. What is the term for the condition characterized by high blood pressure?
    a) Hypotension
    b) Hypertension
    c) Tachycardia
    d) BradycardiaAnswer: b) Hypertension
  9. Which valve is located between the right atrium and right ventricle?
    a) Mitral valve
    b) Tricuspid valve
    c) Aortic valve
    d) Pulmonary valveAnswer: b) Tricuspid valve
  10. What is the primary function of the coronary arteries?
    a) To supply blood to the brain
    b) To supply blood to the lungs
    c) To supply blood to the heart muscle itself
    d) To drain deoxygenated blood from the heartAnswer: c) To supply blood to the heart muscle itself
  11. Which part of the heart pumps oxygenated blood to the entire body?
    a) Right atrium
    b) Left atrium
    c) Right ventricle
    d) Left ventricleAnswer: d) Left ventricle
  12. Which vein carries deoxygenated blood from the lower half of the body to the right atrium?
    a) Jugular vein
    b) Pulmonary vein
    c) Inferior vena cava
    d) Superior vena cavaAnswer: c) Inferior vena cava
  13. What is the term for the heart’s relaxation phase?
    a) Systole
    b) Diastole
    c) Ischemia
    d) TachycardiaAnswer: b) Diastole
  14. Which condition involves the narrowing of the coronary arteries due to plaque buildup?
    a) Myocardial infarction
    b) Atherosclerosis
    c) Endocarditis
    d) PericarditisAnswer: b) Atherosclerosis
  15. Which heart chamber receives oxygenated blood from the lungs?
    a) Right atrium
    b) Left atrium
    c) Right ventricle
    d) Left ventricleAnswer: b) Left atrium

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