Q1. Which condition results when the SA node fails to function properly?A. HypertensionB. BradycardiaC. AnemiaD. Thrombosis
Q3. Which of the following conditions is characterized by an irregular heartbeat?A. BradycardiaB. TachycardiaC. ArrhythmiaD. Angina
Q4. Which of the following is correct about erythropoiesis?A. Erythropoiesis occurs in the spleen of adults.B. Iron is essential for erythropoiesis.C. Erythropoietin is released by the liver to stimulate RBC production.D. Erythrocytes retain their nucleus throughout their lifespan.
Q5. Which blood disorder is caused by reduced hemoglobin levels?A. PolycythemiaB. AnemiaC. ThrombocytosisD. Leukocytosis
Q6. Which of the following statements about blood clotting is incorrect?A. Thrombin converts fibrinogen into fibrin.B. Platelets release clotting factors.C. Calcium ions are not required for blood clotting.D. A clot is also called a thrombus.
Q7. Which of the following statements about veins is incorrect?A. Veins carry blood toward the heart.B. Veins always carry deoxygenated blood.C. Veins have valves to prevent backflow of blood.D. Veins have thinner walls than arteries.
Q8. Which of the following is incorrect regarding the function of hemoglobin?A. Hemoglobin binds oxygen in the lungs.B. Hemoglobin does not play a role in carbon dioxide transport.C. Hemoglobin contains iron.D. Hemoglobin is found in red blood cells.
Q9. Which of the following statements about the human heart is incorrect?A. The right atrium receives deoxygenated blood from the body.B. The left ventricle pumps blood into the pulmonary artery.C. The SA node acts as the pacemaker of the heart.D. The heart has four chambers.
Q10. Which of the following is correct about the pulmonary circulation?A. It carries deoxygenated blood from the lungs to the heart.B. It supplies oxygenated blood to body tissues.C. It involves the pulmonary arteries and veins.D. It includes the aorta and systemic capillaries.