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. | 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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2.
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The
first line of defense against infection includes a. | mucous membranes. | c. | killer T cells. | b. | neutrophils. | d. | antibodies. | | | | |
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3.
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When
a puncture wound becomes infected, a. | damaged cells release chemicals that promote the immune
response. | b. | local blood vessels dilate. | c. | white blood
cells move into the injured area. | d. | All of the above | | |
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4.
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Which
of the following pairs is incorrectly associated? a. | cytotoxic T
cells—attack and kill infected cells | b. | helper T cells—activate cytotoxic T cells and B
cells | c. | B cells—engulf cells that are infected with
microbes | d. | macrophages—consume pathogens and infected
cells | | |
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5.
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When
B cells encounter a pathogen, they a. | secrete interleukin-2, which stimulates cytotoxic T
cells. | b. | divide and produce large amounts of
antibody. | c. | initiate an inflammatory response. | d. | attack the cell
by making a hole in its membrane. | | |
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6.
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HIV
causes AIDS by attacking and destroying a. | helper T cells. | c. | neutrophils. | b. | B
cells. | d. | antibodies. | | | | |
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