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 (D)</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 (D)</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 (C)</p> Signup and view all the answers

What is the function of opsonization?

<p>To enhance phagocytosis of bacteria (C)</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 (B)</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 (C)</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 (A)</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 (B)</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 (C)</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 (D)</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 (C)</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 (B)</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 (D)</p> Signup and view all the answers

What is a characteristic of adaptive immunity?

<p>It is specific and improves upon repeated exposure (D)</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 (A)</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 (C)</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 (B)</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 (D)</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 (D)</p> Signup and view all the answers

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

<p>The adaptive immune response (D)</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 (C)</p> Signup and view all the answers

What is the effect of IL-4 on IgE?

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

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

<p>Inducing class switching to IgA (C)</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 (D)</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 (B)</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 (B)</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 (D)</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 (C)</p> Signup and view all the answers

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