Chapter 24: Self-Quiz In addition to the immune system, we are protected from disease by the skin mucous membranes natural secretions such as acids, protein-digesting enzymes, and antibiotics phagocytic cells and natural killer cells all of the above Body cells infected by viruses are destroyed mostly by IgA phagocytes natural killer cells histamines natural antibiotics Fevers have the following effect: decrease interferon production decrease the concentration of iron in the blood decrease the activity of phagocytes increase the rate of reproduction of invading bacteria all of the above T- and B-cells are lymphocytes macrophages natural killer cells red blood cells phagocytes During allergic responses, IgE covers invaders and marks them for phagocytosis pokes holes in cell membranes of invading parasites binds to mast cells, causing them to release histamine triggers the production of antigens by lymphocytes promotes secretion of antibodies into the digestive and respiratory tracts What shuts off the immune response in T- and B-cells after an infection has been conquered? IgA histamine pyrogens natural killer cells suppressor T cells All of the following are examples of a nonspecific response against infection except: phagocytic white blood cells antibodies fever inflammation All of the above are specific. Cells that destroy other cells that have been virally infected are called phagocytic cells lysozymes antibodies macrophages natural killer cells Which of the following are not true of macrophages? They are amoeboid. They crawl around in the extracellular fluid. They act by phagocytosis. They "present" microbes to the immune system. All of these are true of macrophages. Antibodies are Y-shaped. The specific part of the Y that binds to an antigen is the _____________________. constant region tips of the arms stem of the Y heavy chain light chain The major function of cell-mediated immunity is to increase the amount of complement increase the number of macrophages promote the production of antigen destroy cancerous or infected host cells agglutinate antigens Suppressor T-cells suppress: the formation of antibodies the immune response the production of B-cells cell reproduction the memory of past invasions Vaccinations prevent disease by injecting ______________ into the person. weakened or killed microbes antibiotics the disease itself antibodies against the disease antibodies against similar diseases An AIDS patient dies because the lack of immune response leads to other serious infections he or she lacks HIV antibodies there are no drugs to slow the progress of the disease the AIDS virus has a high rate of mutation HIV destroys the internal organs Designed in cooperation with Andrew Stull and Steven Brunasso. Last Update - July 25, 1997 © Prentice-Hall, Inc. A Simon & Schuster Company Upper Saddle River, New Jersey 07458 Legal Statement
Designed in cooperation with Andrew Stull and Steven Brunasso. Last Update - July 25, 1997
Last Update - July 25, 1997
