Q1. Which blood disorder is caused by an excessive number of red blood cells?A. AnemiaB. PolycythemiaC. ThrombocytopeniaD. Leukocytosis
Q2. Which type of blood vessel has the thickest walls?A. VeinsB. ArteriesC. CapillariesD. Lymphatic vessels
Q3. Which of the following is incorrect about plasma?A. Plasma is a non-viscous fluid.B. Plasma constitutes about 55% of blood.C. Plasma contains proteins like albumin and fibrinogen.D. Plasma helps in the transport of nutrients and waste products.
Q4. Which of the following is incorrect regarding the lymphatic system?A. It plays a role in immune defense.B. It absorbs fats from the intestine.C. It transports oxygen and carbon dioxide.D. It drains excess interstitial fluid.
Q5. What is the function of Purkinje fibers in the heart?A. Generate electrical impulsesB. Transmit impulses to ventriclesC. Control blood pressureD. Regulate heart valve movement
Q6. Which of the following is incorrect about systemic circulation?A. It supplies oxygenated blood to the body.B. It starts from the left ventricle and ends at the right atrium.C. It involves the pulmonary artery.D. It includes arteries, veins, and capillaries.
Q8. Which heart valve prevents backflow of blood from the right ventricle into the right atrium?A. Mitral valveB. Tricuspid valveC. Aortic valveD. Pulmonary valve
Q9. Which of the following statements about veins is true?A. They have thick, muscular wallsB. They carry blood under high pressureC. They have valves to prevent backflowD. They always carry oxygenated blood
Q10. Which of the following is incorrect about the human circulatory system?A. It consists of a four-chambered heart.B. It is an open circulatory system.C. It involves double circulation.D. Arteries generally carry oxygenated blood.