McGraw-Hill Online Learning Center Test<BLURT>

McGraw-Hill Online Learning Center Test

1. Review the animation and answer the following questions.

Vaccination is designed to protect an individual from infectious agents by

A. killing bacteria nonspecifically.
B. destroying factors essential for the growth of the infectious agent.
C. removing all infected body cells.
D. priming the immune response against a less-virulent version of the agent.

2. Vaccination often uses attenuated or disabled version of an infectious agent to A. cause the production of cytotoxic T-cells against that infectious agent.
B. allow the complement system to better attack that particular agent.
C. prepare the body for a faster and more vigorous secondary immune response against the particular agent.
D. prime the infectious agents for attack by interferons.

3. Some vaccinations yield lifetime immunity while others are only effective for a short period of time. This short-lived immunity is most likely due to A. shorter lifespans of memory cells.
B. decreasing amounts of specific antibodies over time.
C. removal of specific antigens introduced by the vaccines.
D. shorter lifespans of macrophages.

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