Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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Mucous membranes a. | cover all the body’s surfaces. | b. | line internal
body surfaces that are in contact with the environment. | c. | produce
antibodies to combat infection. | d. | secrete sweat, which has antibacterial
enzymes. | | |
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2.
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Mucous membranes a. | are moist epithelial layers that are impermeable to most
pathogens. | b. | line the nasal passages, mouth, lungs, digestive tract,
urethra, and vagina. | c. | contain glands that secrete mucus, a sticky fluid that traps
pathogens. | d. | All of the above | | |
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3.
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The
role of helper T cells in immune responses is to a. | secrete interleukin-1. | b. | stimulate
macrophages to initiate an “alarm signal.” | c. | initiate the
activities of neutrophils. | d. | activate two different types of immune system
cells. | | |
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4.
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Vaccines are effective in preventing disease because they a. | interfere with
the release of suppressor T cells. | b. | are antibodies directed against specific
pathogens. | c. | contain specific B cells and T cells. | d. | trigger antibody
formation. | | |
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5.
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Vaccines are produced from killed or weakened a. | phagocytes. | c. | helper T
cells. | b. | pathogens. | d. | B cells. | | | | |
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6.
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Which
of the following is true about the release of histamine from cells in the nasal
passages? a. | It occurs during
an allergic reaction. | b. | It causes nearby capillaries to
swell. | c. | It may cause increased secretion by mucous
membranes. | d. | All of the above | | |
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