Reading Comprehension Success in 20 Minutes a Day, 3rd Edition

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P O S T T E S T
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1 6 5
43. What is the analogy used to describe the
communications network among the cells in
the immune system?
a. the immune system’s memory
b. immune troops eliminating intruders
c. bees swarming around a hive
d. a sea of microbes
44. The immune cells and other cells in the body
coexist peaceably in a state known as
a. equilibrium.
b. self-tolerance.
c. harmony.
d. tolerance.

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45. What is the specific term for the substance
capable of triggering an inappropriate or
harmful immune response to a harmless
substance such as ragweed pollen?
a. antigen
b. microbe
c. allergen
d. autoimmune disease
46. How do the cells in the immune system
recognize an antigen as “foreign” or “nonself?”
a. through an allergic response
b. through blood type
c. through fine hairs protruding from the
antigen surface
d. through characteristic shapes on the antigen
surface
47. After you have had the chicken pox, your
immune system will be able to do all of the
following EXCEPT
a. prevent your offspring from infection by the
chicken pox virus.
b. distinguish between your body cells and that
of the chicken pox virus.
c. “remember” previous experiences with the
chicken pox virus.
d. match up and counteract nonself molecules in
the form of the chicken pox virus.
48. Which of the following best expresses the main
idea of this passage?
a. An antigen is any substance that triggers an
immune response.
b. The basic function of the immune system is to
distinguish between self and nonself.