Adaptive Immune Response Quiz
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Questions and Answers

What is the function of Gamma interferon produced by Th-1 cells?

  • Inhibits MHC II expression
  • Activates B cells to produce IgM
  • Suppresses CD8 T cell growth
  • Activates macrophages to become more effective killers of intracellular microbes (correct)

    • What is the function of CD4 lymphocytes?

  • To help B cells develop into antibody-producing plasma cells (correct)
  • To activate macrophages to engulf bacteria
  • To produce antibodies against antigens
  • To recognize and kill infected cells directly

    • What is the function of the antigen receptor on the surface of B cells?

  • To recognize and kill infected cells
  • To activate macrophages to engulf bacteria
  • To recognize antigen epitopes complexed with MHC II
  • To recognize and process antigens directly (correct)

    • What is the function of IL-2 produced by Th-1 cells?

    <p>To stimulate the growth of both CD4 and CD8 T cells</p> Signup and view all the answers

    What is the primary function of the antigen-MHC class I complex in cell-mediated immunity?

    <p>Recognition by cytotoxic T lymphocytes</p> Signup and view all the answers

    What is the function of CD8-positive T cells?

    <p>To recognize antigen epitopes complexed with MHC I</p> Signup and view all the answers

    What is the function of opsonization?

    <p>To enhance phagocytosis of bacteria</p> Signup and view all the answers

    Which type of immunity is primarily responsible for defense against extracellular pathogens and their toxins?

    <p>Antibody-mediated immunity</p> Signup and view all the answers

    What is the function of Th-2 cells?

    <p>To help B cells develop into antibody-producing plasma cells</p> Signup and view all the answers

    What is the role of helper T lymphocytes in antibody-mediated immunity?

    <p>Recognition of antigens and activation of B cells</p> Signup and view all the answers

    What is the function of the antigen receptor on the surface of T cells?

    <p>To recognize antigen epitopes complexed with MHC I and MHC II</p> Signup and view all the answers

    What is the result of the antigen-MHC class II complex being recognized by helper T lymphocytes?

    <p>Development of delayed hypersensitivity and activation of macrophages</p> Signup and view all the answers

    What is the primary function of antibodies in antibody-mediated immunity?

    <p>Opsonization of pathogens and neutralization of toxins</p> Signup and view all the answers

    What type of pathogens are cell-mediated immunity and antibody-mediated immunity primarily effective against?

    <p>Intracellular bacteria and viruses</p> Signup and view all the answers

    What is the result of the activation of B cells in antibody-mediated immunity?

    <p>Clonal proliferation and differentiation into plasma cells</p> Signup and view all the answers

    Which cells are responsible for bridging the innate and adaptive arms of the immune response?

    <p>Macrophages and dendritic cells</p> Signup and view all the answers

    What is a characteristic of adaptive immunity?

    <p>It is specific and improves upon repeated exposure</p> Signup and view all the answers

    What is the function of helper T cells in the adaptive immune response?

    <p>To activate the adaptive arm of the immune response</p> Signup and view all the answers

    What is the primary difference between neutrophils and macrophages/dendritic cells?

    <p>Their ability to present antigen to helper T cells</p> Signup and view all the answers

    What is a characteristic of cell-mediated immunity and antibody-mediated immunity?

    <p>They both exhibit remarkable diversity and specificity</p> Signup and view all the answers

    What is the role of memory T cells and memory B cells in the adaptive immune response?

    <p>They are responsible for the long-term memory of the adaptive immune response</p> Signup and view all the answers

    How long does it take for the adaptive arm of the immune system to become fully functional?

    <p>Several days</p> Signup and view all the answers

    What is the third line of defense in the immune system?

    <p>The adaptive immune response</p> Signup and view all the answers

    What is the primary function of Th-2 cells in humoral immunity?

    <p>Enhancing host defense against worms through IL-4 and IL-5</p> Signup and view all the answers

    What is the effect of IL-4 on IgE?

    <p>Inducing class switching to IgE</p> Signup and view all the answers

    What is the role of IL-5 in gut immunity?

    <p>Inducing class switching to IgA</p> Signup and view all the answers

    What is the function of CD8 cells?

    <p>Mediating the cytotoxic response against virus-infected cells and tumor cells</p> Signup and view all the answers

    What is the primary method of killing used by CD8 cells?

    <p>Through cytotoxic granules containing perforin and Granzymes</p> Signup and view all the answers

    What is the role of regulatory T CD4 cells (TReg)?

    <p>Suppressing the effector functions of CD4 and CD8 T cells</p> Signup and view all the answers

    What is the function of B cells during the induction process?

    <p>Recognizing antigens with their surface IgM and presenting antigen to helper T cells</p> Signup and view all the answers

    What is the fate of some B cells after connecting with T helper cells?

    <p>They become memory B cells</p> Signup and view all the answers

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