Lymphocyte Quiz
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Questions and Answers

What is the function of B lymphocytes in adaptive immunity?

  • They produce cytokines that activate B cells and macrophages
  • They kill cells harboring intracellular microbes
  • They prevent or limit immune responses
  • They produce antibodies and mediate humoral immunity (correct)

    • What is the role of T lymphocytes in cell-mediated immunity?

  • They produce cytokines that activate B cells and macrophages
  • They prevent or limit immune responses
  • They kill cells harboring intracellular microbes (correct)
  • They help B lymphocytes produce antibodies

    • What do CD4+ T cells help with in adaptive immunity?

  • Kill infected host cells
  • Produce antibodies
  • Produce cytokines that activate B cells and macrophages (correct)
  • Destroy microbes

    • What is the function of regulatory T lymphocytes?

    <p>Prevent or limit immune responses</p> Signup and view all the answers

    What is the difference between naive lymphocytes and memory cells?

    <p>Memory cells can rapidly respond to initiate secondary immune responses while naive lymphocytes cannot</p> Signup and view all the answers

    What is the function of effector B lymphocytes?

    <p>Produce antibodies in response to antigenic stimulation</p> Signup and view all the answers

    What is the function of effector CD8+ T cells?

    <p>Kill cells harboring intracellular microbes</p> Signup and view all the answers

    What is the role of CD4+ T cells in adaptive immunity?

    <p>Produce cytokines that activate B cells and macrophages</p> Signup and view all the answers

    What is the function of memory cells in adaptive immunity?

    <p>Rapidly respond to initiate secondary immune responses</p> Signup and view all the answers

    What is the difference between B and T lymphocytes?

    <p>T lymphocytes recognize only peptide fragments of protein antigens bound to MHC molecules while B lymphocytes do not</p> Signup and view all the answers

    What is the function of effector CD4+ T cells?

    <p>Produce cytokines that activate B cells and macrophages</p> Signup and view all the answers

    What is the function of naive lymphocytes in adaptive immunity?

    <p>Recognize microbial antigens and differentiate into effector cells and memory cells</p> Signup and view all the answers

    Which type of lymphocyte is responsible for cell-mediated immunity?

    <p>Effector T cells</p> Signup and view all the answers

    What is the function of B lymphocytes in the immune system?

    <p>Produce antibodies and mediate humoral immunity</p> Signup and view all the answers

    What is the function of CD4+ T cells in the immune system?

    <p>Produce cytokines that activate B cells</p> Signup and view all the answers

    What is the function of regulatory T lymphocytes in the immune system?

    <p>Prevent or limit immune responses</p> Signup and view all the answers

    What is the function of effector B lymphocytes in the immune system?

    <p>Produce antibodies and mediate humoral immunity</p> Signup and view all the answers

    What is the function of effector CD8+ T cells in the immune system?

    <p>Kill cells harboring intracellular microbes</p> Signup and view all the answers

    What is the function of memory cells in the immune system?

    <p>Initiate secondary immune responses</p> Signup and view all the answers

    What is the function of naive lymphocytes in the immune system?

    <p>Recognize microbial antigens and differentiate into effector cells and memory cells</p> Signup and view all the answers

    What is the function of effector CD4+ T cells in the immune system?

    <p>Produce cytokines that activate B cells</p> Signup and view all the answers

    What is the function of plasma cells in the immune system?

    <p>Produce antibodies and mediate humoral immunity</p> Signup and view all the answers

    What is the function of CD8+ T cells in the immune system?

    <p>Kill cells harboring intracellular microbes</p> Signup and view all the answers

    What is the function of CD4+ T cells in the immune system?

    <p>Produce cytokines that activate B cells</p> Signup and view all the answers

    Which type of lymphocyte is responsible for cell-mediated immunity?

    <p>Effector T cells</p> Signup and view all the answers

    What is the function of B lymphocytes in the immune system?

    <p>Produce antibodies and mediate humoral immunity</p> Signup and view all the answers

    What is the function of CD4+ T cells in the immune system?

    <p>Produce cytokines that activate B cells</p> Signup and view all the answers

    What is the function of regulatory T lymphocytes in the immune system?

    <p>Prevent or limit immune responses</p> Signup and view all the answers

    What is the function of effector B lymphocytes in the immune system?

    <p>Produce antibodies and mediate humoral immunity</p> Signup and view all the answers

    What is the function of effector CD8+ T cells in the immune system?

    <p>Kill cells harboring intracellular microbes</p> Signup and view all the answers

    What is the function of memory cells in the immune system?

    <p>Initiate secondary immune responses</p> Signup and view all the answers

    What is the function of naive lymphocytes in the immune system?

    <p>Recognize microbial antigens and differentiate into effector cells and memory cells</p> Signup and view all the answers

    What is the function of effector CD4+ T cells in the immune system?

    <p>Produce cytokines that activate B cells</p> Signup and view all the answers

    What is the function of plasma cells in the immune system?

    <p>Produce antibodies and mediate humoral immunity</p> Signup and view all the answers

    What is the function of CD8+ T cells in the immune system?

    <p>Kill cells harboring intracellular microbes</p> Signup and view all the answers

    What is the function of CD4+ T cells in the immune system?

    <p>Produce cytokines that activate B cells</p> Signup and view all the answers

    Study Notes

    Lymphocytes: Key Mediators of Adaptive Immunity

    • Lymphocytes are cells that produce specific receptors for diverse antigens and are essential for adaptive immunity.
    • A healthy adult has 0.5 to 1 × 1012 lymphocytes, which are morphologically similar but heterogeneous in lineage, function, and phenotype.
    • B lymphocytes produce antibodies and mediate humoral immunity by expressing membrane-bound antibodies that recognize antigens and initiate activation of the cells.
    • T lymphocytes are responsible for cell-mediated immunity and recognize only peptide fragments of protein antigens bound to MHC molecules.
    • CD4+ T cells help B lymphocytes produce antibodies and phagocytes destroy microbes, while CD8+ T cells kill cells harboring intracellular microbes.
    • Regulatory T lymphocytes prevent or limit immune responses.
    • Naive lymphocytes recognize microbial antigens and differentiate into effector cells and memory cells, which are initiated by antigen recognition.
    • Effector lymphocytes are differentiated progeny of naive cells that have the ability to produce molecules that eliminate antigens.
    • Effector B lymphocytes are antibody-secreting cells called plasma cells that produce antibodies in response to antigenic stimulation.
    • Effector CD4+ T cells produce cytokines that activate B cells, macrophages, and other cell types.
    • Effector CD8+ T cells have the machinery to kill infected host cells.
    • Memory cells are generated from antigen-stimulated lymphocytes and can survive for long periods in the absence of antigen, rapidly responding to initiate secondary immune responses when encountering the same antigen.

    Lymphocytes: Key Mediators of Adaptive Immunity

    • Lymphocytes are cells that produce specific receptors for diverse antigens and are essential for adaptive immunity.
    • A healthy adult has 0.5 to 1 × 1012 lymphocytes, which are morphologically similar but heterogeneous in lineage, function, and phenotype.
    • B lymphocytes produce antibodies and mediate humoral immunity by expressing membrane-bound antibodies that recognize antigens and initiate activation of the cells.
    • T lymphocytes are responsible for cell-mediated immunity and recognize only peptide fragments of protein antigens bound to MHC molecules.
    • CD4+ T cells help B lymphocytes produce antibodies and phagocytes destroy microbes, while CD8+ T cells kill cells harboring intracellular microbes.
    • Regulatory T lymphocytes prevent or limit immune responses.
    • Naive lymphocytes recognize microbial antigens and differentiate into effector cells and memory cells, which are initiated by antigen recognition.
    • Effector lymphocytes are differentiated progeny of naive cells that have the ability to produce molecules that eliminate antigens.
    • Effector B lymphocytes are antibody-secreting cells called plasma cells that produce antibodies in response to antigenic stimulation.
    • Effector CD4+ T cells produce cytokines that activate B cells, macrophages, and other cell types.
    • Effector CD8+ T cells have the machinery to kill infected host cells.
    • Memory cells are generated from antigen-stimulated lymphocytes and can survive for long periods in the absence of antigen, rapidly responding to initiate secondary immune responses when encountering the same antigen.

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    Description

    Test your knowledge of lymphocytes, the key mediators of adaptive immunity, with this quiz! From the types of lymphocytes to their functions in the immune response, this quiz covers it all. Challenge yourself to see how much you know about these important cells and their role in keeping us healthy. Keywords: lymphocytes, adaptive immunity, B lymphocytes, T lymphocytes, memory cells, immune response.

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