Immunity and Antibody Quiz
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Questions and Answers

What type of immunity results from vaccination?

  • Artificially acquired active immunity (correct)
  • Innate immunity
  • Naturally acquired passive immunity
  • Artificially acquired passive immunity
  • Naturally acquired active immunity
  • What type of immunity results from the transfer of antibodies from one individual to a susceptible individual by means of injection?

  • Naturally acquired passive immunity
  • Artificially acquired passive immunity (correct)
  • Artificially acquired active immunity
  • Innate immunity
  • Naturally acquired active immunity
  • What type of immunity results from recovery from mumps?

  • Artificially acquired active immunity
  • Naturally acquired active immunity (correct)
  • Artificially acquired passive immunity
  • Naturally acquired passive immunity
  • Innate immunity
  • Which of the following is the best definition of epitope?

    <p>Specific regions on antigens that interact with antibodies</p> Signup and view all the answers

    Newborns' immunity due to the transfer of antibodies across the placenta is an example of?

    <p>Naturally acquired passive immunity</p> Signup and view all the answers

    Which of the following statements is NOT a possible outcome of antigen-antibody reaction?

    <p>Clonal deletion</p> Signup and view all the answers

    Which of the following cells is NOT an APC?

    <p>Natural killer cells</p> Signup and view all the answers

    When an antibody binds to a toxin, the resulting action is referred to as?

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

    CD4+ T cells are activated by?

    <p>Interaction between CD4+ and MHC II</p> Signup and view all the answers

    Which of the following recognizes antigens displayed on host cells with MHC II?

    <p>TH cell</p> Signup and view all the answers

    The specificity of an antibody is due to?

    <p>The variable portions of the H and L chains</p> Signup and view all the answers

    Which of the following is NOT a characteristic of B cells?

    <p>They recognize antigens associated with MHC I</p> Signup and view all the answers

    Which of the following is NOT a characteristic of cellular immunity?

    <p>B cells make antibodies</p> Signup and view all the answers

    Plasma cells are activated by a(n)?

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

    The antibodies found in mucus, saliva, and tears are?

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

    The antibodies found almost entirely and only on the surface of B cells (not secreted from them), and which always exist as monomers, are?

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

    The antibodies that can bind to large parasites are?

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

    In addition to IgG, the antibodies that can fix complement are?

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

    Large antibodies that agglutinate antigens are?

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

    The most abundant class of antibodies in serum is?

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

    Study Notes

    Immunity Types

    • Artificially Acquired Active Immunity: Gained through vaccination.
    • Artificially Acquired Passive Immunity: Involves transferring antibodies via injection.
    • Naturally Acquired Active Immunity: Developed after recovering from an infection, such as mumps.
    • Naturally Acquired Passive Immunity: Newborns receive antibodies through the placenta.

    Antibody Interactions

    • Epitope: Specific antigen regions that interact with antibodies.
    • Neutralization: When an antibody binds to a toxin, it neutralizes its harmful effects.
    • ADCC (Antibody-Dependent Cellular Cytotoxicity): Mediated by immune cells recognizing antibody-coated targets.

    T Cells and Antigen Recognition

    • CD4+ T Cells Activation: Triggered by the interaction of CD4+ with MHC II molecules.
    • TH Cell: Recognizes antigens presented on host cells with MHC II.

    Structure and Function of Antibodies

    • Specificity of Antibodies: Determined by the variable portions of heavy (H) and light (L) chains.
    • Types of Antibodies:
      • IgG: Most abundant in serum and involved in complement fixation.
      • IgM: Large antibodies that agglutinate antigens; also fixes complement.
      • IgA: Found in secretions like mucus and saliva.
      • IgD: Primarily found on the surface of B cells; not secreted.
      • IgE: Binds to large parasites and mediates allergic reactions.

    B Cells and Cellular Immunity

    • B Cells Characteristics:
      • Originate in the bone marrow and possess antibodies on their surfaces.
      • Responsible for memory response and antibody production.
    • T Cells Characteristics:
      • Originate in bone marrow, processed in the thymus, and can inhibit immune responses.

    Other Key Points

    • Antigen-Antibody Reactions: Outcomes include opsonization, activation of complement, and agglutination; clonal deletion is NOT an outcome.
    • Antigen Presentation: Natural killer cells do not act as antigen-presenting cells (APCs); APCs include dendritic cells, macrophages, and mature B cells.
    • Plasma Cells Activation: Triggered by antigen exposure.

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    Description

    Test your knowledge on different types of immunity, antibody interactions, and T cell activation. This quiz covers essential concepts related to how the immune system functions and the role of antibodies in protecting the body. Dive in to enhance your understanding of immunology!

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