Innate and Adaptive Immune Systems Overview
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Questions and Answers

What is the primary role of CD4 coreceptors in immune response?

  • Directly kill infected cells
  • Assist in activating helper T cells (correct)
  • Present antigens to cytotoxic T cells
  • Enhance B cell activation without T cell involvement
  • During thymocyte selection, what is the purpose of negative selection?

  • To prevent autoimmunity by eliminating self-reactive thymocytes (correct)
  • To eliminate T cells that bind too weakly to MHC molecules
  • To increase the total number of matured thymocytes
  • To promote T cells that react strongly to self-antigens
  • What mechanism do effector cytotoxic T cells use to kill infected target cells?

  • Using antibodies to neutralize the target cells
  • Engulfing and digesting the infected cells
  • Releasing perforin and granzymes to induce cell death (correct)
  • Secreting cytokines that induce apoptosis
  • How does a conjugate vaccine activate both B cells and helper T cells?

    <p>By linking a polysaccharide to a protein antigen</p> Signup and view all the answers

    Which of the following best describes herd immunity?

    <p>The resistance to the spread of infectious disease within a population achieved when a sufficient proportion becomes immune</p> Signup and view all the answers

    What are the roles of naïve, effector, and memory cells in the immune response?

    <p>Effector cells are primarily involved in immediate pathogen elimination.</p> Signup and view all the answers

    What process do lymphocytes undergo to migrate out of the bloodstream?

    <p>Diapedesis</p> Signup and view all the answers

    What is the primary function of defensins in the innate immune system?

    <p>Bind to pathogens and neutralize them</p> Signup and view all the answers

    Which cell type is primarily responsible for recognizing viral infections in the innate immune system?

    <p>Natural Killer (NK) cells</p> Signup and view all the answers

    What phenomenon describes the ability of the immune system to avoid attacking its own cells?

    <p>Immunological self-tolerance</p> Signup and view all the answers

    Which molecules are essential for T cell activation by dendritic cells?

    <p>Major Histocompatibility Complex (MHC) proteins</p> Signup and view all the answers

    What is clonal selection in the context of the adaptive immune response?

    <p>The expansion of a specific lymphocyte following antigen exposure.</p> Signup and view all the answers

    How many pathways does the complement system have, and what is their primary function?

    <p>Three pathways, enhancing the ability to clear pathogens.</p> Signup and view all the answers

    Study Notes

    Innate Immune System

    • Briefly describe innate and adaptive immune systems
    • Describe barriers to pathogens, including defensins, PAMPs, and PRRs
    • Briefly describe TLRs, NLRs, RLRs, and CLRs
    • Describe the inflammatory response initiated through PRR activation, including inflammasomes
    • Describe the function, location, and response of macrophages and neutrophils
    • Describe the three pathways of the complement system and how they are shut down
    • Discuss how the innate immune system identifies viruses and how NK and cytotoxic T cells recognize viruses
    • Describe the function of dendritic cells

    Adaptive Immune System

    • Describe the general differences, functions, and activation of B and T cells
    • Explain clonal expansion and clonal selection
    • Describe the primary and secondary immune responses and the role of naïve, effector, and memory cells in immunological memory
    • Describe lymphocyte recirculation and how lymphocytes migrate out of the bloodstream
    • Describe immunological self-tolerance and the four mechanisms underlying the process
    • Explain what can happen when self-tolerance mechanisms fail
    • Define B cell receptors, how they induce B cells to secrete antibodies, and the structure of an antibody

    Additional Topics

    • Describe the stages of B cell development (tables provided)
    • How a T-cell response differs from a B cell response to a pathogen
    • Describe the classes of T cells and their functions
    • Explain the process of T cell activation by a dendritic cell and the structure and function of MHC proteins
    • Describe the processing of foreign proteins for presentation to cytotoxic and helper T cells
    • Define the functions of CD4 and CD8 coreceptors
    • Process of positive to thymocytes. What is the purpose of negative selection
    • Describe how effector cytotoxic T cells kill infected target cells
    • Describe how activated helper T cells assist in killing infected target cells
    • Structure of invariant chains associated with BCRs and TCRs
    • How the same antigen can activate a helper T cell and a B cell
    • Describe the three types of vaccines
    • Describe the process of how a conjugate vaccine activates B and helper T cells
    • Explain nucleic acid COVID-19 vaccines and how they work
    • Define herd immunity and relate it to measles vaccinations (1998 effect)

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    Related Documents

    BIO-333 Chapter 24 Guide 7e PDF

    Description

    This quiz covers the key concepts of the innate and adaptive immune systems, including their functions, barriers to pathogens, and cellular responses. It delves into the roles of macrophages, neutrophils, dendritic cells, and B and T cells, as well as the complement system and immune memory. Test your knowledge on these essential components of immunology.

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