1) Which of the following is a physical barrier of innate immunity? a) Lysozyme in tears b) Antibodies c) Stratified squamous epithelium of the skin d) Interferons 2) Which structure is part of the mucociliary escalator? a) Neutrophils b) Ciliated epithelium of the respiratory tract c) Alveolar macrophages d) Antibodies 3) Lysozyme contributes to innate immunity by: a) Activating T cells b) Breaking down peptidoglycan in bacterial cell walls c) Killing virus-infected cells d) Activating complement 4) Which of the following is considered a chemical barrier of innate immunity? a) Skin shedding b) Urine flow c) Gastric acid (low pH) d) Cilia movement 5) Which cell is primarily responsible for phagocytosis in the second line of innate immunity? a) B lymphocyte b) CD8⁺ T cell c) Macrophage d) Plasma cell 6) Which immune response targets extracellular pathogens? a) Cell-mediated immunity b) Humoral immunity c) Natural killer cell response d) Interferon response 7) Antibodies are produced by: a) Macrophages b) CD8⁺ T cells c) Plasma cells d) Dendritic cells 8) Which immune mechanism is most effective against intracellular pathogens? a) Antibody neutralization b) Complement activation c) CD8⁺ cytotoxic T cells d) Lysozyme 9) Which molecule presents exogenous (extracellular) antigens to T cells? a) MHC I b) MHC II c) Antibody d) Complement 10) Which statement correctly compares innate and adaptive immunity? a) Innate immunity is specific and has memory b) Adaptive immunity responds immediately c) Innate immunity is non-specific and lacks memory d) Adaptive immunity uses only physical barriers

Immunology Basics Quiz

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