Antigen Presentation Pathway in B Cells
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Questions and Answers

What is the primary function of antibodies produced during the humoral immune response?

  • To activate complement proteins
  • To bind to and neutralize extracellular pathogens (correct)
  • To directly kill pathogens
  • To stimulate the proliferation of T helper cells
  • Which type of antigen requires the direct involvement of T helper cells for effective antibody production by B cells?

  • Thymus-independent antigens
  • Thymus-dependent antigens (correct)
  • Non-protein antigens
  • Self-antigens
  • What is the primary role of cytokines secreted by T helper cells during the humoral immune response?

  • To stimulate the proliferation and differentiation of B cells (correct)
  • To activate complement proteins
  • To inhibit the production of antibodies
  • To directly kill pathogens
  • Which immunoglobulin class is typically associated with the initial antibody response to a foreign antigen?

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

    What is the primary mechanism by which B cells differentiate into antibody-producing plasma cells during the humoral immune response?

    <p>Cytokine-induced differentiation</p> Signup and view all the answers

    Which of the following is a key characteristic of the long-term memory response in the humoral immune system?

    <p>Rapid production of high-affinity antibodies</p> Signup and view all the answers

    What is the main role of the B7 molecules in the activation of TH cells?

    <p>To provide a co-stimulatory signal for proper antigen presentation and TH cell activation</p> Signup and view all the answers

    What is the primary function of the CD40L molecule expressed on activated TH cells?

    <p>To induce B cell proliferation and antibody production</p> Signup and view all the answers

    Which of the following cytokines secreted by TH cells is MOST important for inducing immunoglobulin class switching in B cells?

    <p>IL-4</p> Signup and view all the answers

    What is the primary function of B cell memory cells generated during the primary immune response?

    <p>To rapidly proliferate and secrete antibodies upon re-exposure to the same antigen</p> Signup and view all the answers

    What is the key difference between T cell-dependent (TD) and T cell-independent (TI) antigens in terms of B cell activation?

    <p>TD antigens require the help of TH cells for B cell activation, while TI antigens do not</p> Signup and view all the answers

    Which of the following is the MOST important step in the process of B cell activation and antibody production?

    <p>Direct contact between B cells and activated TH cells</p> Signup and view all the answers

    What is the main function of B cell activation in the acquired immune response?

    <p>Produce antibodies to fight off pathogens</p> Signup and view all the answers

    Which type of immune response involves antibody production by B lymphocytes?

    <p>Humoral immunity</p> Signup and view all the answers

    How do T helper (TH) cells contribute to the immune response?

    <p>Release cytokines to activate other immune cells</p> Signup and view all the answers

    What process involves B cells switching the class of immunoglobulins they produce?

    <p>Immunoglobulin class switching</p> Signup and view all the answers

    Which action is NOT typically associated with cytokine secretion in the immune system?

    <p>Directly killing infected cells</p> Signup and view all the answers

    During B cell activation, what is the primary role of antibodies produced by plasma cells?

    <p>Recognize and bind to specific antigens</p> Signup and view all the answers

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