Biology 172 Quiz 16B: Body Defenses and Immunity

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Biology 172 Quiz 16B: Body Defenses and Immunity
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2013-12-17 17:06:32
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Biology 172 Quiz 16B Body Defenses Immunity
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Biology 172 Quiz 16B: Body Defenses and Immunity
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  1. A benefit of inflammation is 
    A.anaphylactic shock
    B.increased blood flow to damaged area brings in defensive cells and delivers clotting elements 
    C.that it coats pathogens with complement proteins 
    D.in increasing the temperature "set point" of the hypothalamus
    E.that it provides general protection against viral infections by rendering protection to cells not yet infected by viruses 
    B.increased blood flow to damaged area brings in defensive cells and delivers clotting elements
    (this multiple choice question has been scrambled)
  2. A major difference between active and passive immunity is that active immunity requires 
    A.proliferation of erythrocytes in bone marrow
    B.acquisition and activation of antibodies from the infectious agent 
    C.direct exposure to a living or simulated pathogen 
    D.secretion of interleukins from macrophages
    E.transfer of antibodies from the mother across the placenta 
    C.direct exposure to a living or simulated pathogen
    (this multiple choice question has been scrambled)
  3. B cells are usually activated into clonal proliferation into plasma cells and memory cells as a consequence of 
    A.antigens binding to antigen receptors on the B cells 
    B.activated Helper T cells binding to class II MHC-antigen complexes on B cells 
    C.Helper T cells secreting cytokines 
    D.answers "a" and "b" above
    E.answers "a", "b" & "c" above
    Answer Key: E
  4. Chemicals that cause body's temperature to rise, resulting in fever are 
    A.antibodies 
    B.interferons 
    C.prostaglandins
    D.pyrogens 
    E.histamines
    D.pyrogens
    (this multiple choice question has been scrambled)
  5. In which of the following situations will helper T cells be activated?
    A.when B cells respond to T-independent antigens 
    B.when a cytotoxic T cell releases cytokines 
    C.when natural killer (NK) cells come in contact with a tumor cell
    D.when an antigen is displayed by a dendritic cell 
    E.in the bone marrow during the self tolerance test 
    D.when an antigen is displayed by a dendritic cell
    (this multiple choice question has been scrambled)
  6. Phagocytosis of microbes by macrophages is enhanced by 
    A.the binding of antibodies to the surface of microbes 
    B.antibody-mediated agglutination of microbes 
    C.the release of cytokines by activated B cells
    D.A and B only 
    E.A, B, and C
    Answer Key: D
  7. Sebaceous fluids produced by the skin protect the body against infection by 
    A.promoting the growth of white blood cells 
    B.maintaining a pH that is conducive to the growth of normal flora 
    C.including antibodies specific to those pathogens
    D.containing the enzyme lysozyme that destroys bacteria 
    E.keeping the skin dry, hard and stiff
    B.maintaining a pH that is conducive to the growth of normal flora
    (this multiple choice question has been scrambled)
  8. The complement reaction 
    A.can be induced by the binding of antibodies to the surfaces of foreign cells 
    B.all of these
    C.may enhance the ability of phagocytes to engulf bacteria pathogens 
    D.does not always require antibodies bound to cell surfaces to occur
    E.may cause foreign cells to lyse 
    B.all of these
    (this multiple choice question has been scrambled)
  9. Which antibody type is most effective at agglutination responses? 
    A.IgA
    B.IgD
    C.IgG 
    D.IgM 
    E.IgE 
    D.IgM
    (this multiple choice question has been scrambled)
  10. Which of the following cell types are responsible for initiating a secondary immune response? 
    A.macrophages 
    B.B cells 
    C.memory cells 
    D.T cells
    E.stem cells
    C.memory cells
    (this multiple choice question has been scrambled)
  11. Which of the following is a mechanism of antibody action? 
    A.precipitation of soluble antigens 
    B.neutralization of toxins
    C.all of these
    D.agglutination of foreign cells 
    E.enhanced phagocytosis of foreign cells and particles 
    C.all of these
    (this multiple choice question has been scrambled)
  12. Why can normal immune responses be described as polyclonal? 
    A.Diverse antibodies are produced for different epitopes of a specific antigen. 
    B.Macrophages, T cells, and B cells all are involved in normal immune response. 
    C.Blood contains many different antibodies to many different antigens.
    D.Construction of a hybridoma requires multiple types of cells. 
    E.Multiple immunoglobulins are produced from descendants of a single B cell.
    A.Diverse antibodies are produced for different epitopes of a specific antigen.
    (this multiple choice question has been scrambled)
  13. An allergy occurs when 
    A.the immune system is compromised by retrovirus infection 
    B.antigen binds to antibodies on the surfaces of mast cells causing the release of histamine
    C.the immune system looses the ability to distinguish self from nonself 
    D.cytotoxic T cells bind to class I MHC's
    E.an autoimmune disease occurs 
    B.antigen binds to antibodies on the surfaces of mast cells causing the release of histamine
    (this multiple choice question has been scrambled)
  14. A transfusion of type A blood given to a person who has type O blood would result in which of the following? 
    A.the recipient's anti-A and anti-O antibodies reacting with the donated red blood cells if the donor was a heterozygote (Ai) for blood type
    B.the recipient's anti-A antibodies clumping the donated red blood cells 
    C.the recipient's B antigens reacting with the donated anti-B antibodies
    D.no reaction because type O is a universal donor 
    E.no reaction because the O-type individual does not have antibodies 
    B.the recipient's anti-A antibodies clumping the donated red blood cells
    (this multiple choice question has been scrambled)
  15. CD4 and CD8 are proteins 
    A.secreted by antigen-presenting cells.
    B.present on the surface of natural killer (NK) cells. 
    C.that are T-independent antigens.
    D.that are present on the surface of T cells where they enhance cellular interaction. 
    E.that are on the surface of antigen-presenting cells where they enhance B cell activity. 
    D.that are present on the surface of T cells where they enhance cellular interaction.
    (this multiple choice question has been scrambled)

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