Q1. Which type of WBCs are responsible for allergic reactions?A. NeutrophilsB. BasophilsC. LymphocytesD. Monocytes
Q3. Which structure in the heart ensures unidirectional blood flow?A. SeptumB. NodesC. ValvesD. Arteries
Q4. Which of the following statements about the heart is incorrect?A. The heart is enclosed in a protective pericardium.B. The right atrium receives oxygenated blood from the lungs.C. The left ventricle pumps blood into the aorta.D. The heart has four chambers.
Q5. Which of the following is incorrect about ECG (electrocardiogram)?A. ECG records the electrical activity of the heart.B. The P-wave represents atrial depolarization.C. The T-wave represents ventricular repolarization.D. The QRS complex represents atrial contraction.
Q6. Which of the following statements about thrombocytes (platelets) is incorrect?A. Platelets help in blood clotting.B. Platelets are cell fragments derived from megakaryocytes.C. Platelets release clotting factors upon activation.D. Platelets transport oxygen to tissues.
Q7. Which of the following statements about blood plasma is incorrect?A. Plasma contains dissolved proteins such as albumin.B. Plasma is responsible for oxygen transport in the blood.C. Plasma constitutes about 55% of total blood volume.D. Plasma helps in the transport of hormones and nutrients.
Q8. Which of the following is a function of the lymphatic system?A. Oxygen transportB. Fat absorptionC. Glucose metabolismD. Blood clotting
Q9. Which of the following statements about veins is correct?A. Veins always carry deoxygenated blood.B. Veins have thinner walls compared to arteries.C. Veins do not contain any valves.D. Veins transport blood away from the heart.
Q10. Which ion plays a crucial role in blood clotting?A. Sodium (Na⁺)B. Potassium (K⁺)C. Calcium (Ca²⁺)D. Magnesium (Mg²⁺)