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Questions and Answers

What is an antigen?

  • A pathogen-specific molecular structure that triggers the adaptive immune response. (correct)
  • A protein that is produced by B cells in response to foreign antigens.
  • A type of white blood cell that engulfs and destroys pathogens.
  • A molecule that helps to transport oxygen in the blood.

    • What is the function of the Fab region of an antibody molecule?

  • It is the site of antigen binding. (correct)
  • It determines the antibody's class.
  • It is the site of antibody-dependent cell-mediated cytotoxicity.
  • It is the site of complement factor binding.

    • What is the most abundant antibody in human blood?

  • IgA
  • IgD
  • IgM
  • IgG (correct)

    • What is the function of IgA antibodies?

    <p>They are found in mucus secretions that protect mucous membranes.</p> Signup and view all the answers

    What is the function of antibodies in opsonization?

    <p>Tagging pathogens for destruction by phagocytic cells.</p> Signup and view all the answers

    What is the function of IgM antibodies?

    <p>They are the most efficient for agglutination.</p> Signup and view all the answers

    What is the function of antibodies in neutralization?

    <p>Binding to certain antibodies on the surface of pathogens or toxins, preventing their attachment to cells.</p> Signup and view all the answers

    What is the function of antibodies in ADCC?

    <p>Enhancing killing of large pathogens through antibody-dependent cell-mediated cytotoxicity.</p> Signup and view all the answers

    What is the role of antibodies in immune defense?

    <p>Enhancing the body's ability to defend against a wide range of pathogens.</p> Signup and view all the answers

    What is an antigen?

    <p>A pathogen-specific molecular structure that triggers the adaptive immune response.</p> Signup and view all the answers

    What is the function of the Fab region of an antibody molecule?

    <p>It is the site of antigen binding.</p> Signup and view all the answers

    What is the most abundant antibody in human blood?

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

    What is the function of IgA antibodies?

    <p>They are found in mucus secretions that protect mucous membranes.</p> Signup and view all the answers

    What is the function of antibodies in opsonization?

    <p>Tagging pathogens for destruction by phagocytic cells.</p> Signup and view all the answers

    What is the function of IgM antibodies?

    <p>They are the most efficient for agglutination.</p> Signup and view all the answers

    What is the function of antibodies in neutralization?

    <p>Binding to certain antibodies on the surface of pathogens or toxins, preventing their attachment to cells.</p> Signup and view all the answers

    What is the function of antibodies in ADCC?

    <p>Enhancing killing of large pathogens through antibody-dependent cell-mediated cytotoxicity.</p> Signup and view all the answers

    What is the role of antibodies in immune defense?

    <p>Enhancing the body's ability to defend against a wide range of pathogens.</p> Signup and view all the answers

    Which of the following is true about antigens?

    <p>They are unique to a specific pathogen</p> Signup and view all the answers

    What is the function of the Fab region of an antibody molecule?

    <p>Binding to antigens</p> Signup and view all the answers

    Which antibody class is the most abundant in human blood?

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

    What is the function of IgA antibodies?

    <p>Protection of mucous membranes</p> Signup and view all the answers

    What is the function of antibodies in neutralization?

    <p>Preventing attachment of pathogens to cells</p> Signup and view all the answers

    Which antibody class is restricted to anti-parasitic defenses and allergic reactions?

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

    What is the function of antibodies in agglutination?

    <p>Making pathogens easier for phagocytes to ingest and destroy</p> Signup and view all the answers

    What is the function of IgM antibodies?

    <p>Opsonization for phagocytosis</p> Signup and view all the answers

    What is the role of antibodies in antibody-dependent cell-mediated cytotoxicity (ADCC)?

    <p>Enhancing killing of large pathogens through effector cells</p> Signup and view all the answers

    What is the primary function of antibodies in immune defense?

    <p>To neutralize pathogens</p> Signup and view all the answers

    Which antibody class is restricted to anti-parasitic defenses and allergic reactions?

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

    Which region of the antibody molecule is the site of complement factor binding and binding to phagocytic cells during antibody-mediated opsonization?

    <p>Fc region</p> Signup and view all the answers

    Which antibody class is the first antibody produced and secreted by B cells during the primary and secondary immune responses?

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

    What is the function of IgA antibodies?

    <p>To protect mucous membranes</p> Signup and view all the answers

    Which antibody class accounts for about 13% of total serum antibody and is found in mucus secretions that protect mucous membranes?

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

    What is the function of antibodies in agglutination?

    <p>To aggregate pathogens</p> Signup and view all the answers

    Which antibody class is versatile in defending against pathogens?

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

    What is the function of antibodies in antibody-dependent cell-mediated cytotoxicity (ADCC)?

    <p>To enhance killing of large pathogens</p> Signup and view all the answers

    Which antibody class is a membrane-bound monomer found on the surface of B cells?

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

    What is the most efficient antibody class for agglutination?

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

    What is the role of antibodies in innate immunity?

    <p>To enhance the body's ability to defend against pathogens</p> Signup and view all the answers

    What is the function of the Fc region of an antibody molecule?

    <p>Binding to complement factors</p> Signup and view all the answers

    Which antibody is restricted to anti-parasitic defenses and allergic reactions?

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

    What is the primary function of IgM antibodies?

    <p>Agglutination of pathogens</p> Signup and view all the answers

    What is the function of antibodies in neutralization of pathogens?

    <p>Preventing attachment to target cells</p> Signup and view all the answers

    Which antibody accounts for about 13% of total serum antibody and is found in mucus secretions that protect mucous membranes?

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

    What is the function of antibodies in agglutination of pathogens?

    <p>Clumping pathogens together</p> Signup and view all the answers

    Which antibody is a membrane-bound monomer found on the surface of B cells?

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

    What is the function of antibodies in opsonization of pathogens?

    <p>Enhancing phagocytosis</p> Signup and view all the answers

    Which antibody is versatile in defending against pathogens?

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

    What is the function of antibodies in ADCC?

    <p>Enhancing killing of large pathogens</p> Signup and view all the answers

    Which antibody is the first antibody produced and secreted by B cells during the primary and secondary immune responses?

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

    Which region of the antibody molecule is the site of antigen binding?

    <p>Fab region</p> Signup and view all the answers

    What is the primary function of antibodies in immune defense?

    <p>To eliminate pathogens</p> Signup and view all the answers

    Which antibody class accounts for about 13% of total serum antibody and is found in mucus secretions that protect mucous membranes?

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

    What is the least abundant antibody class in serum and is restricted to anti-parasitic defenses and allergic reactions?

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

    Which region of the antibody molecule is the site of complement factor binding and binding to phagocytic cells during antibody-mediated opsonization?

    <p>Fc region</p> Signup and view all the answers

    Which antibody class is the first antibody produced and secreted by B cells during the primary and secondary immune responses?

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

    Which antibody class is versatile in defending against pathogens and is the most abundant antibody in human blood?

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

    What is the function of antibodies in agglutination?

    <p>To cause aggregation of pathogens</p> Signup and view all the answers

    What antibody class has a pentameric structure with ten Fab binding sites, making them the most efficient for agglutination?

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

    What is the function of antibodies in neutralization?

    <p>To neutralize toxins</p> Signup and view all the answers

    What is the function of antibodies in ADCC?

    <p>To eliminate pathogens</p> Signup and view all the answers

    What is the function of antibodies in opsonization?

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

    What is the role of antibodies in innate immunity?

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

    What is the primary function of antibodies in immune defense?

    <p>To prevent the attachment of pathogens to target cells</p> Signup and view all the answers

    Which antibody class is found in mucus secretions that protect mucous membranes?

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

    What is the role of the Fc region of an antibody molecule?

    <p>To bind to complement factors</p> Signup and view all the answers

    Which antibody class is restricted to anti-parasitic defenses and allergic reactions?

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

    What is the primary function of antibodies in agglutination?

    <p>To cause pathogens to clump together for easier destruction by phagocytic cells</p> Signup and view all the answers

    Which antibody class is the first antibody produced and secreted by B cells during the primary and secondary immune responses?

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

    What is the function of antibodies in complement activation?

    <p>To recruit phagocytes and enhance phagocytosis and killing of gram-negative bacteria</p> Signup and view all the answers

    Which antibody class accounts for the majority of serum antibodies in human blood?

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

    What is the role of antibodies in ADCC?

    <p>To enhance killing of large pathogens through antibody-dependent cell-mediated cytotoxicity</p> Signup and view all the answers

    Which antibody class is a membrane-bound monomer found on the surface of B cells?

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

    What is the most efficient antibody class for agglutination?

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

    What is the function of the Fab region of an antibody molecule?

    <p>To bind to antigens on the surface of pathogens</p> Signup and view all the answers

    What is the role of the Fc region of an antibody molecule?

    <p>It is the site of complement factor binding and binding to phagocytic cells during antibody-mediated opsonization</p> Signup and view all the answers

    What is the function of IgE antibodies?

    <p>They are restricted to anti-parasitic defenses and allergic reactions</p> Signup and view all the answers

    What is the function of antibodies in agglutination?

    <p>They cause agglutination or aggregation of pathogens, making them easier for phagocytes to ingest and destroy</p> Signup and view all the answers

    What is the most efficient antibody for agglutination?

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

    What is the function of antibodies in complement activation?

    <p>They activate the complement cascade through the classical pathway, recruiting phagocytes and enhancing phagocytosis and killing of gram-negative bacteria</p> Signup and view all the answers

    What is the function of IgA antibodies?

    <p>They account for about 13% of total serum antibody and are found in mucus secretions that protect mucous membranes</p> Signup and view all the answers

    What is the function of antibodies in antibody-dependent cell-mediated cytotoxicity (ADCC)?

    <p>They enhance killing of large pathogens through ADCC, involving NK cells, macrophages, and eosinophils</p> Signup and view all the answers

    What is the function of IgD antibodies?

    <p>They are a membrane-bound monomer found on the surface of B cells</p> Signup and view all the answers

    What is the function of antibodies in neutralization?

    <p>They neutralize pathogens by binding to their antigens, preventing them from attaching to target cells</p> Signup and view all the answers

    What is the role of antibodies in linking adaptive specific immunity and innate nonspecific immunity?

    <p>They provide an important link between adaptive specific immunity and innate nonspecific immunity</p> Signup and view all the answers

    What is the function of antibodies in opsonization?

    <p>They bind to pathogens and help phagocytic cells attach to and engulf them</p> Signup and view all the answers

    What is the function of the constant region of an antibody molecule?

    <p>It determines the class or isotype of the antibody</p> Signup and view all the answers

    What is the primary function of antibodies in immune defense?

    <p>To neutralize pathogens</p> Signup and view all the answers

    Which antibody class is restricted to anti-parasitic defenses and allergic reactions?

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

    Which antibody class is found in mucus secretions that protect mucous membranes?

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

    Which antibody class is the first antibody produced and secreted by B cells during the primary and secondary immune responses?

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

    What is the function of the Fc region of an antibody molecule?

    <p>To bind to complement factors</p> Signup and view all the answers

    Which antibody class is a membrane-bound monomer found on the surface of B cells?

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

    What is the most efficient antibody class for agglutination?

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

    Which antibody class accounts for the majority of total serum antibody?

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

    What is the function of antibodies in opsonization?

    <p>To tag pathogens for destruction by phagocytic cells</p> Signup and view all the answers

    What is the function of antibodies in complement activation?

    <p>To enhance phagocytosis and killing of gram-negative bacteria</p> Signup and view all the answers

    What is the function of antibodies in ADCC?

    <p>To enhance killing of large pathogens</p> Signup and view all the answers

    What is the structure of IgM antibodies?

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

    What is the primary function of antibodies in immune defense?

    <p>To enhance the body's ability to defend against pathogens</p> Signup and view all the answers

    Which antibody is the most efficient for agglutination?

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

    What is the role of the Fc region of an antibody molecule?

    <p>To bind to complement factors</p> Signup and view all the answers

    Which antibody class is restricted to anti-parasitic defenses and allergic reactions?

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

    What is the function of IgA antibodies?

    <p>To protect mucous membranes</p> Signup and view all the answers

    Which antibody is the first produced and secreted by B cells during the primary and secondary immune responses?

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

    What is the function of antibody-dependent cell-mediated cytotoxicity (ADCC)?

    <p>To enhance killing of large pathogens through effector cells</p> Signup and view all the answers

    Which region of the antibody molecule determines its class?

    <p>Constant region</p> Signup and view all the answers

    What is the function of antibodies in agglutination?

    <p>To make pathogens easier for phagocytes to ingest and destroy</p> Signup and view all the answers

    Which antibody is versatile in defending against pathogens?

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

    What is the primary function of antigens?

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

    What is the site of antigen binding on the antibody molecule?

    <p>Fab region</p> Signup and view all the answers

    What is the primary function of antibodies in immune defense?

    <p>To neutralize or eliminate foreign antigens</p> Signup and view all the answers

    Which antibody class is found in mucus secretions that protect mucous membranes?

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

    What is the least abundant antibody class in serum?

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

    Which antibody class is a membrane-bound monomer found on the surface of B cells?

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

    What is the function of the Fc region of the antibody molecule?

    <p>To bind to phagocytic cells during antibody-mediated opsonization</p> Signup and view all the answers

    Which antibody class is the first antibody produced and secreted by B cells during the primary and secondary immune responses?

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

    What is the function of antibodies in agglutination?

    <p>To recruit phagocytes and enhance phagocytosis and killing of gram-negative bacteria</p> Signup and view all the answers

    Which antibody class is versatile in defending against pathogens?

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

    What is the function of antibodies in complement activation?

    <p>To activate the complement cascade through the classical pathway</p> Signup and view all the answers

    What is the structure of IgM antibodies?

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

    What is the role of antibodies in antibody-dependent cell-mediated cytotoxicity (ADCC)?

    <p>To release cytotoxins to kill the pathogen</p> Signup and view all the answers

    What is the link between adaptive specific immunity and innate nonspecific immunity?

    <p>Antibodies provide an important link between adaptive specific immunity and innate nonspecific immunity</p> Signup and view all the answers

    What is the primary function of antibodies in immune defense?

    <p>To eliminate pathogens</p> Signup and view all the answers

    Which antibody class is found in mucus secretions that protect mucous membranes?

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

    What is the function of the Fc region of the antibody molecule?

    <p>To bind to complement factors</p> Signup and view all the answers

    Which antibody class is restricted to anti-parasitic defenses and allergic reactions?

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

    What is the primary function of neutralization in immune defense?

    <p>To prevent pathogen attachment</p> Signup and view all the answers

    Which antibody class is a membrane-bound monomer found on the surface of B cells?

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

    What is the function of agglutination in immune defense?

    <p>To make pathogens easier to ingest</p> Signup and view all the answers

    Which antibody class is the first antibody produced and secreted by B cells during the primary and secondary immune responses?

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

    What is the function of opsonization in immune defense?

    <p>To tag pathogens for destruction</p> Signup and view all the answers

    Which antibody class is versatile in defending against pathogens?

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

    What is the function of antibody-dependent cell-mediated cytotoxicity (ADCC) in immune defense?

    <p>To tag pathogens for destruction</p> Signup and view all the answers

    What is the function of the constant region of the antibody molecule?

    <p>To determine the antibody class</p> Signup and view all the answers

    What is the role of the Fc region of an antibody molecule?

    <p>It is the site of complement factor binding and binding to phagocytic cells during antibody-mediated opsonization</p> Signup and view all the answers

    What is the function of IgE antibodies?

    <p>To defend against parasites</p> Signup and view all the answers

    Which antibody is the first produced and secreted by B cells during the primary and secondary immune responses?

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

    What is the function of IgD antibodies?

    <p>To act as a membrane-bound monomer found on the surface of B cells</p> Signup and view all the answers

    What is the function of antibodies in agglutination?

    <p>To make pathogens easier for phagocytes to ingest and destroy</p> Signup and view all the answers

    Which antibody accounts for about 13% of total serum antibody and is found in mucus secretions that protect mucous membranes?

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

    What is the most efficient antibody for agglutination?

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

    What is the function of antibodies in complement activation?

    <p>To recruit phagocytes and enhance phagocytosis and killing of gram-negative bacteria</p> Signup and view all the answers

    What is the function of antibodies in neutralization?

    <p>To prevent pathogens or toxins from attaching to cells</p> Signup and view all the answers

    Which antibody is the most versatile in defending against pathogens?

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

    What is the function of antibodies in ADCC?

    <p>To enhance killing of large pathogens through antibody-dependent cell-mediated cytotoxicity (ADCC)</p> Signup and view all the answers

    What is the role of the constant region of the antibody molecule?

    <p>It determines the class or isotype of the antibody</p> Signup and view all the answers

    What is the role of the Fc region of an antibody molecule?

    <p>It is the site of complement factor binding and binding to phagocytic cells during antibody-mediated opsonization.</p> Signup and view all the answers

    Which antibody class is restricted to anti-parasitic defenses and allergic reactions?

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

    What is the most efficient antibody for agglutination?

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

    What is the function of ADCC in immune defense?

    <p>To enhance killing of large pathogens through the involvement of NK cells, macrophages, and eosinophils.</p> Signup and view all the answers

    Which antibody class accounts for about 13% of total serum antibody and is found in mucus secretions that protect mucous membranes?

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

    Which of the following is NOT a function of antibodies in immune defense?

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

    What is the function of IgD antibodies?

    <p>To act as a membrane-bound monomer found on the surface of B cells.</p> Signup and view all the answers

    Which antibody class is versatile in defending against pathogens?

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

    What is the primary function of neutralization in immune defense?

    <p>To prevent pathogens from attaching to target cells.</p> Signup and view all the answers

    Which antibody class is the first antibody produced and secreted by B cells during the primary and secondary immune responses?

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

    What is the function of antibodies in opsonization?

    <p>To bind to pathogens and help phagocytic cells attach to and engulf them.</p> Signup and view all the answers

    What is the structure of IgM antibodies?

    <p>Pentameric with ten Fab binding sites</p> Signup and view all the answers

    What is the primary function of antibodies in immune defense?

    <p>To neutralize pathogens</p> Signup and view all the answers

    What is the most efficient antibody for agglutination?

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

    Which antibody class is restricted to anti-parasitic defenses and allergic reactions?

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

    What is the function of the Fc region of an antibody molecule?

    <p>To bind to phagocytic cells during opsonization</p> Signup and view all the answers

    Which antibody class accounts for about 13% of total serum antibody and is found in mucus secretions that protect mucous membranes?

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

    What is the first antibody produced and secreted by B cells during the primary and secondary immune responses?

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

    What is the site of antigen binding on an antibody molecule?

    <p>The Fab region</p> Signup and view all the answers

    Which antibody class is versatile in defending against pathogens?

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

    What is the function of antibodies in agglutination?

    <p>To cause clumping of pathogens</p> Signup and view all the answers

    What is the function of antibodies in ADCC?

    <p>To enhance killing of large pathogens</p> Signup and view all the answers

    Which antibody class is a membrane-bound monomer found on the surface of B cells?

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

    What is the role of antibodies in complement activation?

    <p>To recruit phagocytes and enhance phagocytosis and killing of gram-negative bacteria</p> Signup and view all the answers

    What are antigens?

    <p>Molecules that trigger the adaptive immune response</p> Signup and view all the answers

    What is the role of the Fab region of an antibody molecule?

    <p>Site of antigen binding</p> Signup and view all the answers

    What determines the class or isotype of an antibody?

    <p>The constant region of the antibody molecule</p> Signup and view all the answers

    Which antibody class is the least abundant in serum?

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

    What is the function of IgA antibodies?

    <p>Protect mucous membranes</p> Signup and view all the answers

    What is the primary function of antibodies in immune defense?

    <p>Neutralize or eliminate foreign antigens</p> Signup and view all the answers

    Which antibody class is the first antibody produced and secreted by B cells during the primary and secondary immune responses?

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

    What is the most efficient antibody class for agglutination?

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

    What is opsonization?

    <p>Tagging pathogens for destruction by phagocytic cells</p> Signup and view all the answers

    What is the function of antibodies in complement activation?

    <p>Recruiting phagocytes and enhancing phagocytosis and killing of gram-negative bacteria</p> Signup and view all the answers

    What is ADCC?

    <p>Antibody-dependent cell-mediated cytotoxicity</p> Signup and view all the answers

    What is the structure of IgM antibodies?

    <p>Pentameric with ten Fab binding sites</p> Signup and view all the answers

    What is the primary function of antibodies in immune defense?

    <p>To neutralize or eliminate foreign antigens</p> Signup and view all the answers

    Which antibody class is the most efficient for agglutination?

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

    What is the role of IgE antibodies in immune defense?

    <p>To defend against parasites and allergies</p> Signup and view all the answers

    Which region of the antibody molecule is the site of complement factor binding?

    <p>Fc region</p> Signup and view all the answers

    What determines the class or isotype of an antibody molecule?

    <p>The constant region</p> Signup and view all the answers

    What is the function of IgA antibodies in immune defense?

    <p>To protect mucous membranes</p> Signup and view all the answers

    Which antibody class is the most abundant in human blood?

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

    What is the function of antibodies in opsonization?

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

    Which antibody class is a membrane-bound monomer found on the surface of B cells?

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

    What is the function of antibodies in complement activation?

    <p>To recruit phagocytes and enhance phagocytosis</p> Signup and view all the answers

    What is the function of antibodies in ADCC?

    <p>To enhance killing of large pathogens</p> Signup and view all the answers

    What is the role of antibodies in neutralization?

    <p>To neutralize or eliminate foreign antigens</p> Signup and view all the answers

    What are antigens?

    <p>Molecules that trigger the adaptive immune response</p> Signup and view all the answers

    What is the function of the Fc region of an antibody molecule?

    <p>Site of complement factor binding and binding to phagocytic cells during antibody-mediated opsonization</p> Signup and view all the answers

    What determines the class or isotype of an antibody?

    <p>The constant region of the antibody molecule</p> Signup and view all the answers

    Which antibody is the first produced and secreted by B cells during the primary and secondary immune responses?

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

    Which antibody accounts for about 13% of total serum antibody and is found in mucus secretions that protect mucous membranes?

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

    Which antibody is a membrane-bound monomer found on the surface of B cells?

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

    Which antibody is restricted to anti-parasitic defenses and allergic reactions?

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

    What is the function of antibodies in agglutination?

    <p>Making pathogens easier for phagocytes to ingest and destroy</p> Signup and view all the answers

    Which antibody is the most efficient for agglutination?

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

    What is the process of antibody-dependent cell-mediated cytotoxicity (ADCC)?

    <p>Effector cells releasing cytotoxins to kill the pathogen</p> Signup and view all the answers

    What is the most abundant antibody in human blood?

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

    What is the function of antibodies in complement activation?

    <p>Activating the complement cascade through the classical pathway</p> Signup and view all the answers

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

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

    Which region of the antibody molecule is responsible for antigen binding?

    <p>Fab region</p> Signup and view all the answers

    Which antibody class is found in mucus secretions that protect mucous membranes?

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

    What is the function of IgE antibodies?

    <p>Anti-parasitic defenses and allergic reactions</p> Signup and view all the answers

    Which antibody class is the first antibody produced and secreted by B cells during the primary and secondary immune responses?

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

    What is the function of antibodies in opsonization?

    <p>To tag pathogens for destruction by phagocytic cells</p> Signup and view all the answers

    Which antibody class is versatile in defending against pathogens and is the most abundant antibody in human blood?

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

    What is the function of antibodies in neutralization?

    <p>To bind to pathogens and prevent their attachment to target cells</p> Signup and view all the answers

    Which antibody class is a membrane-bound monomer found on the surface of B cells?

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

    What is the function of antibodies in ADCC?

    <p>To enhance killing of large pathogens through antibody-dependent cell-mediated cytotoxicity</p> Signup and view all the answers

    Which antibody class is restricted to anti-parasitic defenses and allergic reactions?

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

    What is the role of antibodies in immune defense?

    <p>All of the above</p> Signup and view all the answers

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