Immunology: Defense Against Infection
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Questions and Answers

What are the two classes of MHC proteins found in the body?

  • Class IV MHC proteins and Class V MHC proteins
  • Class I MHC proteins and Class III MHC proteins
  • Class III MHC proteins and Class IV MHC proteins
  • Class I MHC proteins and Class II MHC proteins (correct)
  • What type of graft is transplanted from one part of the body to another?

  • Xenograft
  • Isograft
  • Autograft (correct)
  • Allograft
  • What is the primary function of Toll-like receptors in the immune response?

  • To produce antibodies against antigens
  • To recognize and respond to pathogen-associated molecular patterns (correct)
  • To recognize and bind to specific antigens
  • To facilitate phagocytosis of foreign particles
  • What is the purpose of ABO blood typing?

    <p>To classify blood based on the presence of inherited antigenic carbohydrates on the surface of red blood cells</p> Signup and view all the answers

    What is the purpose of a cytotoxic cross match test in transplantation?

    <p>To detect the presence of anti-donor antibodies in the recipient's serum</p> Signup and view all the answers

    What is the primary function of phagocytosis in the immune response?

    <p>To engulf and eliminate foreign particles and cellular debris</p> Signup and view all the answers

    What type of antibody is typically attached to the surface of B cells?

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

    What is the primary function of lymph nodes in the immune system?

    <p>To act as filters, collecting and destroying bacteria and viruses</p> Signup and view all the answers

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

    <p>To destroy infected cells by recognizing antigens presented on MHC-I</p> Signup and view all the answers

    What is the term for the small, accessible portion of an antigen that is recognized by lymphocytes?

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

    What type of antibody is responsible for preventing attachment of pathogens to epithelial cell surfaces?

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

    What is the term for the binding of the Fc portion of an antibody to the Fc-receptor on an effector cell?

    <p>Immunoglobin binding</p> Signup and view all the answers

    What is the estimated number of different antibody molecules in an individual?

    <p>1000</p> Signup and view all the answers

    What is the primary reason for using humanized antibodies over mouse antibodies?

    <p>To reduce the risk of inducing human anti-mouse antibodies</p> Signup and view all the answers

    What is the primary site of mucosal immunity in the body?

    <p>Intestinal mucous epithelium</p> Signup and view all the answers

    What is the primary function of macrophages in the immune system?

    <p>To collect and destroy bacteria and viruses</p> Signup and view all the answers

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