Immunology of animals MCQs January 8, 2026March 13, 2024 by u930973931_answers 36 min Score: 0 Attempted: 0/36 Subscribe 1. . What is the primary function of the immune system in animals? (A) Regulation of body temperature (B) Maintenance of blood glucose levels (C) Defense against pathogens (D) Digestion of food 2. . Which of the following is not a type of white blood cell involved in the immune response? (A) Neutrophil (B) Erythrocyte (C) Lymphocyte (D) Macrophage 3. . What is the role of antibodies in the immune response? (A) Phagocytosis of pathogens (B) Activation of T cells (C) Neutralization and tagging of pathogens for destruction (D) Regulation of inflammation 4. . Which type of immunity is acquired through exposure to a pathogen or vaccine? (A) Innate immunity (B) Active immunity (C) Passive immunity (D) Adaptive immunity 5. . What is the function of the thymus gland in the immune system? (A) Production of antibodies (B) Maturation of T lymphocytes (C) Maturation of B lymphocytes (D) Activation of natural killer cells 6. . Which of the following is an example of a physical barrier in the immune system? (A) Antibodies (B) Mucus membranes (C) Interferons (D) Cytokines 7. . What is the role of dendritic cells in the immune system? (A) Phagocytosis of pathogens (B) Activation of T cells (C) Production of antibodies (D) Killing infected cells 8. . Which of the following is a function of the complement system? (A) Phagocytosis of pathogens (B) Activation of T cells (C) Opsonization of pathogens (D) Production of antibodies 9. . Which of the following is a characteristic of the innate immune system? (A) Specific recognition of pathogens (B) Memory response to pathogens (C) Rapid response to pathogens (D) Generation of antibodies 10. . What is the function of natural killer (NK) cells in the immune system? (A) Phagocytosis of pathogens (B) Production of antibodies (C) Killing infected cells (D) Activation of T cells 11. . Which of the following is not a function of cytokines in the immune system? (A) Activation of immune cells (B) Regulation of inflammation (C) Killing of infected cells (D) Communication between immune cells 12. . What is the primary role of T lymphocytes (T cells) in the immune system? (A) Production of antibodies (B) Phagocytosis of pathogens (C) Killing infected cells (D) Recognition of pathogens 13. . Which of the following is an example of a chemical barrier in the immune system? (A) Skin (B) Antibodies (C) Mucus (D) Neutrophils 14. . What is the function of macrophages in the immune system? (A) Production of antibodies (B) Phagocytosis of pathogens (C) Killing of infected cells (D) Activation of B cells 15. . Which of the following is a function of B lymphocytes (B cells) in the immune system? (A) Killing infected cells (B) Phagocytosis of pathogens (C) Production of antibodies (D) Activation of T cells 16. . Which of the following is an example of a secondary lymphoid organ in the immune system? (A) Bone marrow (B) Thymus (C) Spleen (D) Liver 17. . What is the role of memory cells in the immune system? (A) Detection of pathogens (B) Regulation of inflammation (C) Rapid response to previously encountered pathogens (D) Killing of infected cells 18. . Which of the following is not a characteristic of the adaptive immune system? (A) Specific recognition of pathogens (B) Memory response to pathogens (C) Rapid response to pathogens (D) Generation of antibodies 19. . What is the function of toll-like receptors (TLRs) in the immune system? (A) Activation of cytokines (B) Phagocytosis of pathogens (C) Recognition of pathogens (D) Killing of infected cells 20. . Which of the following is an example of a physical barrier in the immune system? (A) Skin (B) Antibodies (C) Complement proteins (D) Cytokines 21. . What is the primary role of T lymphocytes (T cells) in the immune system? (A) Phagocytosis of pathogens (B) Killing infected cells (C) Production of antibodies (D) Recognition of pathogens 22. . Which of the following is not a function of cytokines in the immune system? (A) Activation of immune cells (B) Regulation of inflammation (C) Killing of infected cells (D) Communication between immune cells 23. . What is the function of natural killer (NK) cells in the immune system? (A) Phagocytosis of pathogens (B) Production of antibodies (C) Killing of infected cells (D) Activation of T cells 24. . Which of the following is a characteristic of the innate immune system? (A) Specific recognition of pathogens (B) Memory response to pathogens (C) Rapid response to pathogens (D) Generation of antibodies 25. . What is the role of dendritic cells in the immune system? (A) Phagocytosis of pathogens (B) Activation of T cells (C) Production of antibodies (D) Killing of infected cells 26. . Which of the following is not a function of the complement system? (A) Phagocytosis of pathogens (B) Activation of T cells (C) Opsonization of pathogens (D) Production of antibodies 27. . What is the function of macrophages in the immune system? (A) Production of antibodies (B) Phagocytosis of pathogens (C) Killing of infected cells (D) Activation of B cells 28. . Which of the following is a function of B lymphocytes (B cells) in the immune system? (A) Killing infected cells (B) Phagocytosis of pathogens (C) Production of antibodies (D) Activation of T cells 29. . Which of the following is an example of a secondary lymphoid organ in the immune system? (A) Bone marrow (B) Thymus (C) Spleen (D) Liver 30. . What is the role of memory cells in the immune system? (A) Detection of pathogens (B) Regulation of inflammation (C) Rapid response to previously encountered pathogens (D) Killing of infected cells 31. . Which of the following is not a characteristic of the adaptive immune system? (A) Specific recognition of pathogens (B) Memory response to pathogens (C) Rapid response to pathogens (D) Generation of antibodies 32. . What is the function of toll-like receptors (TLRs) in the immune system? (A) Activation of cytokines (B) Phagocytosis of pathogens (C) Recognition of pathogens (D) Killing of infected cells 33. . Which of the following is an example of a physical barrier in the immune system? (A) Skin (B) Antibodies (C) Complement proteins (D) Cytokines 34. . What is the primary role of T lymphocytes (T cells) in the immune system? (A) Phagocytosis of pathogens (B) Killing infected cells (C) Production of antibodies (D) Recognition of pathogens 35. . Which of the following is not a function of cytokines in the immune system? (A) Activation of immune cells (B) Regulation of inflammation (C) Killing of infected cells (D) Communication between immune cells 36. . What is the function of natural killer (NK) cells in the immune system? (A) Phagocytosis of pathogens (B) Production of antibodies (C) Killing of infected cells (D) Activation of T cells