21. Principles of Disease
Introduction to Avoiding Host Defense Mechanisms
21. Principles of Disease
Introduction to Avoiding Host Defense Mechanisms - Video Tutorials & Practice Problems
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Introduction to Avoiding Host Defense Mechanisms
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Problem
ProblemAll of the following are methods that pathogens use to avoid phagocytosis by immune cells except which of these answers?
A
The pathogens avoid being bound by C3b proteins that trigger opsonization.
B
The pathogens possess Fc receptors which bind and change the orientation of antibodies bound to them.
C
The pathogens create IgA proteases which break down IgA antibodies before they can bind the pathogen.
D
The pathogens create toxins which damage the phagocytic immune cells stopping phagocytosis.
3
Problem
ProblemCertain pathogens, like Staphylococcus aureus, hide within host cells to avoid being phagocytosed by immune cells. What other advantageous reasons would a pathogen have for hiding within host cells?
A
Avoid being bound by antibodies.
B
Avoid being bound by opsonization proteins like C3b.
C
Avoid triggering the complement system.
D
The pathogen can lie dormant until an opportune time to cause disease.
E
All of the above.
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PRACTICE PROBLEMS AND ACTIVITIES (3)
- Which of the following does not represent the same mechanism for avoiding host defenses as the others?a. Rabie...
- A 12-year-old child hospitalized for Guillain-Barré syndrome had a 4-day history of headache, dizziness, fever...
- After receiving a corneal transplant, a patient developed dementia and loss of motor function, then became com...