Biomed 100 Practice Quiz
Chapter 14, Spring 2007
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  1. The lymphatic system includes the...
    1. spleen
    2. thymus
    3. tonsils
    4. lymph nodes
    5. all of the above
      6.

  2. When does the normally-functioning immune system make an inventory of “self” proteins and other large molecules?
    1. prior to adolescence
      2.
    2. during adolescence
    3. shortly after adolescence
    4. throughout life
    5. none of the above (if the immune system makes an inventory of “self” proteins, the result is autoimmune disease)

  3. All of the following except _?_ could be considered antigens.
    1. fungi
    2. viruses
    3. bacteria
    4. tumor cells
    5. cytotoxic T cells
      6.

  4. _?_ are lymphocytes that have become immunocompetent (able to recognize foreign proteins).
    1. B cells
    2. T cells
    3. both of the above
      4.
    4. none of the above

  5. Any one immunocompetent lymphocyte bears...
    1. one type of receptor, which can bind with one type of antigen
      2.
    2. one type of receptor, which can bind with many types of antigens
    3. millions of different receptors, each capable of binding a different antigen

  6. The initial step in the cellular immune response is...
    1. activation of "memory B cells"
    2. attachment of a T cell to an antigen
      3.
    3. destruction of the DNA of target cells
    4. destruction of the membranes of target cells

  7. B-lymphocytes respond to foreign proteins by producing...
    1. antigens
    2. antibodies
      3.
    3. complement
    4. lymphotoxin

  8. Which one of the following is not one of the primary means by which antibodies counteract antigens?
    1. Antibodies may activate complement, which destroys membranes of target cells.
    2. Antibodies may agglutinate antigens, causing them to become "clumped together."
    3. Antibodies may activate enzymes which result in destruction of target cell DNA.
      4.

  9. True or false? Phagocytic cells including neutrophils can leave the bloodstream by squeezing between the cells of blood vessel walls.
    1. True.
      2.
    2. False.

  10. Which of the following antigens are counteracted primarily by antibodies?
    1. tumor cells / cancer cells
    2. cells that are infected by viruses
    3. viruses and bacteria in blood and other body fluids
      4.
    4. all of the above
    5. none of the above

  11. A cell that has had perforin inserted into its plasma membrane is most likely to be...
    1. a plasma cell
    2. a memory B cell
    3. a cytotoxic T cell
    4. a cell that is infected with viruses
      5.

  12. If a memory B cell is exposed to a previously-encountered antigen...
    1. it produces a "secondary response"
    2. it releases antibodies relatively rapidly
    3. it releases antibodies relatively slowly
    4. both A. and B.
      5.
    5. both A. and C.