Multiple Choice
Which of the following is not a prion disease?
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21. The Immune System
Introduction to the Immune System
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Which of the following is NOT an example of type III hypersensitivities?
A
Post-streptococcal glomerulonephritis
B
Systemic lupus erythematosus
C
Rheumatoid arthritis
D
Contact dermatitis
Verified step by step guidance1
Understand the concept of type III hypersensitivity: It is an immune complex-mediated reaction where antigen-antibody complexes deposit in tissues, leading to inflammation and tissue damage.
Identify examples of type III hypersensitivity: Conditions like post-streptococcal glomerulonephritis, systemic lupus erythematosus, and rheumatoid arthritis are known to involve immune complex deposition.
Recognize the characteristics of contact dermatitis: It is a type IV hypersensitivity reaction, which is cell-mediated and does not involve immune complexes.
Differentiate between type III and type IV hypersensitivities: Type III involves immune complexes, while type IV involves T-cell mediated responses.
Conclude that contact dermatitis is not a type III hypersensitivity because it is a type IV hypersensitivity reaction.
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