Unit 1

    Master this deck with 10 terms through effective study methods.

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    What defines the immune system?

    It protects the host from infections and diseases.

    What is immunity?

    The ability to resist infection or disease.

    What is immunology?

    The study of the immune system's components and functions.

    How do physical barriers function in immunity?

    They prevent pathogens from entering the body.

    What are the major components of the mammalian immune system?

    Cells, organs, and molecules that work together for defense.

    Contrast innate and adaptive immunity.

    Innate immunity is non-specific; adaptive immunity is specific and involves memory.

    What role do complement fragments C3a and C5a play?

    They mediate inflammation and attract phagocytes.

    How is the complement system activated?

    Through classical, alternative, or lectin pathways.

    What is opsonization?

    Coating pathogens with antibodies to enhance phagocytosis.

    What happens if physical barriers are breached?

    Intrinsic cellular defenses and the immune response are activated.