Q1. Which blood cells are the largest in size?A. ErythrocytesB. NeutrophilsC. LymphocytesD. Monocytes
Q2. Which of the following is correct about the role of the AV node?A. It generates the heartbeat independently.B. It slows down the electrical impulse before it reaches the ventricles.C. It is located in the left ventricle.D. It transmits signals directly to the Purkinje fibers.
Q3. Which of the following statements about ECG is correct?A. The P-wave represents ventricular contraction.B. The QRS complex represents ventricular depolarization.C. The T-wave represents atrial depolarization.D. ECG does not measure electrical activity of the heart.
Q4. Which of the following statements about blood pressure is incorrect?A. Systolic pressure is higher than diastolic pressure.B. Diastolic pressure occurs when the ventricles contract.C. A normal blood pressure reading is around 120/80 mmHg.D. Blood pressure is measured using a sphygmomanometer.
Q5. Which heart valve prevents the backflow of blood from the aorta into the left ventricle?A. Tricuspid valveB. Pulmonary valveC. Aortic valveD. Mitral valve
Q6. Which part of the heart has the thickest wall?A. Right atriumB. Left atriumC. Right ventricleD. Left ventricle
Q7. Which of the following statements about the structure of the heart is incorrect?A. The heart is composed of cardiac muscle tissue.B. The left ventricle pumps blood to the lungs.C. The right atrium receives deoxygenated blood from the body.D. The heart is enclosed within a pericardial membrane.
Q8. Which of the following statements about the cardiac cycle is correct?A. Systole refers to heart relaxation.B. Diastole refers to heart contraction.C. One complete cardiac cycle lasts approximately 0.8 seconds.D. The atria and ventricles contract simultaneously.
Q9. Which of the following is correct about cardiac output?A. Cardiac output is the amount of blood pumped per second.B. Cardiac output = stroke volume × heart rate.C. Cardiac output remains constant under all conditions.D. Cardiac output is not influenced by exercise.
Q10. Which blood vessels carry oxygenated blood to the heart?A. Pulmonary veinsB. Pulmonary arteryC. Vena cavaD. Aorta