Q1. Which of the following is an example of a secondary lymphoid organ?A. ThymusB. Bone marrowC. SpleenD. Liver
Q2. Which type of immunity is acquired after recovering from a disease?A. Innate immunityB. Active acquired immunityC. Passive immunityD. Artificial immunity
Q3. Which toxic substance in tobacco is responsible for an increased risk of lung cancer?A. EthanolB. NicotineC. TarD. Morphine
Q4. Which cells act as the first line of defense in innate immunity?A. B-lymphocytesB. T-lymphocytesC. MacrophagesD. Mast cells
Q5. Which disease is caused by the protozoan Entamoeba histolytica?A. MalariaB. AmoebiasisC. RingwormD. Filariasis
Q7. Which of the following is the primary function of the spleen in the immune system?A. Production of antibodiesB. Filtration of blood and removal of old RBCsC. Synthesis of clotting factorsD. Storage of calcium
Q8. Which of the following statements about antibodies is correct?A. Antibodies are produced by T-lymphocytes.B. Plasma cells secrete antibodies.C. Antibodies directly kill pathogens.D. Antibodies are part of the innate immune system.
Q9. Which of the following statements about phagocytosis is correct?A. Phagocytosis is the process by which immune cells engulf and digest pathogens.B. Only B-lymphocytes perform phagocytosis.C. Phagocytosis occurs exclusively in the lymphatic system.D. Phagocytosis is a function of red blood cells.
Q10. Which of the following statements about natural killer (NK) cells is correct?A. NK cells are a type of T-lymphocyte.B. NK cells play a role in innate immunity.C. NK cells produce antibodies.D. NK cells only target extracellular bacteria.