BMS100 Past Test Questions
Chapter 12, Fall 2008
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  1. Which one of the following is not true of hemoglobin?
    1. Hemoglobin is a plasma protein (protein in plasma).
    2. Hemoglobin molecules are complex and contain iron and protein..
    3. While in the lungs, hemoglobin can absorb oxygen.
    4. While in organs other than the lungs, hemoglobin can release oxygen.

  2. Stem cells capable of producing all formed elements of blood are present in
    1. the liver
    2. the spleen
    3. bone marrow
    4. lymphatic organs

  3. What happens to "old" red blood cells (approx. 120 days old)?
    1. They break apart into fragments known as platelets.
    2. They lose their hemoglobin and become white blood cells.
    3. They are destroyed by macrophages in the liver and the spleen.
    4. They are destroyed by macrophages in the kidneys and the gall bladder.

  4. The function of most of the white blood cells is to
    1. produce antibodies
    2. "remember" antigens that have entered the body
    3. surround and engulf foreign particles (phagocytosis)
    4. attach to damaged parts of blood vessels and form plugs and clots

  5. Platelets become activated upon exposure to
    1. viruses
    2. collagen and other "rough surfaces" other than the normal lining of blood vessels
    3. other platelets that are already activated
    4. A and B
    5. B and C

  6. Thrombocytes (platelets) help reduce blood loss from damaged vessels by
    1. forming a "plug" that helps seal the vessel
    2. activating the coagulation process in which threads form a clot
    3. both of the above
    4. none of the above (it is not a function of thrombocytes to reduce blood loss from damaged vessels)