Q1. The basic functional unit of the heart is:
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Q2. Which valve prevents backflow from the left ventricle to the left atrium?
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Q3. What is the normal heart rate of an adult human?
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Q4. Which part of the cardiac conduction system acts as the natural pacemaker?
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Q5. What does the P wave in an ECG represent?
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Q6. Which vessels carry oxygenated blood from the lungs to the heart?
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Q7. Stroke volume refers to:
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Q8. Which layer of the heart wall contains cardiac muscle?
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Q9. The QRS complex in ECG corresponds to:
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Q10. The cardiac output is defined as:
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Q11. Which structure prevents blood backflow from the pulmonary artery into the right ventricle?
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Q12. The function of the chordae tendineae is to:
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Q13. Which vessel is the largest artery in the human body?
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Q14. Heart rate variability measures:
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Q15. The T wave on an ECG represents:
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Q16. Which of the following is a pacemaker cell?
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Q17. The term “afterload” refers to:
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Q18. The timing between heartbeats is measured by:
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Q19. The fastest electrical conduction in the heart occurs in:
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Q20. Which heart chamber has the thickest muscular wall?
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Q21. The cardioinhibitory center is located in the:
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Q22. Which blood vessels connect arteries and veins?
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Q23. What is the normal pressure in the left ventricle during systole?
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Q24. The phase of the cardiac cycle during which ventricles fill with blood is:
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Q25. Which of the following ECG leads records electrical activity between right arm and left arm?
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Q26. Which muscle protein is responsible for thick filament in muscle contraction?
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Q27. Which wave corresponds to atrial repolarization in ECG?
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Q28. The primary pacemaker in the heart is:
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Q29. The thickness of the right ventricle wall is approximately:
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Q30. Which of the following causes the “lub” sound in the heart?
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