Mastering A&P chapter 20 lymphatics – Flashcards
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Phagocytotic cells such as macrophages identify a variety of enemies by recognizing markers unique to pathogens they would be classified as which type of defense system?
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Innate internal defenses
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This cell would be part of humoral immunity
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Plasma B cells
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This area is also called an epitope
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An antigenic determinant
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What type of immunity can be transferred by bodily fluids from one person to another, thus conferring immunity to the recipient?
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Humoral immunity
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The attacking virus would be considered an intracellular pathogen
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Cell mediated immunity (Cellular immunity)
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This pathogen would be inside the cell.
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Cytotoxic T cells
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What are the primary cells of adaptive immunity?
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Lymphocytes
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What is NOT a function of macrophages?
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macrophages activate T lymphocytes ( T cells)
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A patient has a high level of pyrogens, indicating that she:
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Has a fever
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Class I MHC molecules
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Activate cytotoxic T cells
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Determine the first phase of the antibody-mediated immune response
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B cell clones recognize its specific antigen
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B cell proliferation occurs when an antigen binds to a B cell receptor on the surface of a specific B cell clone.
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False
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Which of the following cells are responsible for immunological surveillance and cancer prevention
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NK cells
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Elevated levels of neutrophils indicate
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Bacterial infection
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Which of the following situations would lead to an autoimmune response?
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Self antigens not previously encountered by T cells are released
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What initiates T cell activation?
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T cell activation begins with a cell processing and displaying antigen fragments on its MHC molecules
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Compared to blood capillaries, lymphatic capillaries are
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Blind-ended
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Cell mediated immunity is to T cells as antibody mediated immunity is to
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B cells
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Which of the following is NOT a surface barrier serving as the first line of defense?
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Antibody
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Self antigens usually generate an immune response in our own bodies
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False
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What protein, released by cytotoxic T (Tc) cells, perforates a target cells plasma membrane so that enzymes can enter and fragment the target cells DNA?
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Perforins
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What cells are responsible for cell mediated immunological memory in which the immune response is expedited upon subsequent exposure to an antigen?
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Memory T cells
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The most prevalent antibody which is able to cross the placenta
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IgG
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Which is NOT a function of antibodies?
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Phagocytosis
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Which immune response has a shorter lag phase in which more antibody levels peak more rapidly?
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Secondary immune response
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Type I or immediate hypersensitivity triggers plasma cells to secrete
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IgE
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Failure of the thymus to develop, low circulating levels of lymphocytes and failure of cell-mediated immunity characterize:
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Severe-combined immunodeficiency (SCID)
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