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← Human Body & HealthWhy does anaphylaxis typically worsen with repeated exposure to the same allergen, rather than remaining constant?
A)Decreased mast cell histamine synthesis
B)T-cell exhaustion reduces immune response
C)Increased IgE sensitization of mast cells✓
D)B-cell tolerance induction limits antibodies
💡 Explanation
Anaphylaxis worsens due to increased IgE sensitization of mast cells because initial exposure primes the immune system to produce IgE antibodies specific to the allergen. Therefore, subsequent exposures trigger a more rapid and amplified mast cell degranulation and histamine release, rather than a constant or diminished response due to tolerance or exhaustion.
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