Human Biology (MindTap Course List)
Human Biology (MindTap Course List)
11th Edition
ISBN: 9781305112100
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Textbook Question
Chapter 9, Problem 1SQ

______ are barriers to pathogens at body surfaces.

  1. a. Intact skin and mucous membranes
  2. b. Tears, saliva, and gastric fluid
  3. c. Resident bacteria
  4. d. All are correct
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When bacteria causes the death of most or all of the cells in an organ or tissue due to disease, injury, or failure of the blood supply this is usually called __________. a. opportunisitc b. necrotizing fasciitis c. redundant infection d. hemolysis e. intrinsic
Normal flora may cause opportunistic infections when:(a) They are continually nourished by the body.(b) The microorganism gains access to an unusual body site.(c) They are continually present.(d) They colonize any body surface.
In the Middle Ages, during massive plague epidemic, one of the control measures instituted was the quarantine of infected people. Why was this not successful?
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