Allergic Responses to Inhaled Antigens Occur When an Individual Is

question 7

Multiple Choice

Allergic responses to inhaled antigens occur when an individual is first sensitized to the antigen (i.e., the allergen) , inducing an immune response, and then has a subsequent exposure to the same antigen. The sensitization phase is characterized by:

• A) Induction of IgA antibodies against the allergen
• B) Activation of tissue-resident ILC3 cells following stimulation by the allergen
• C) Induction of a CD4 T cell type II immune response
• D) Production of high concentrations of IL-12 and IL-23 by tissue-resident dendritic cells
• E) Recruitment of large numbers of neutrophils to the site of allergen entry

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