A nursing student is studying the body's response to an allergen. Which of the following immunoglobulins is released during an allergic response?

IgE

Explanation

• IgE binds to allergens and triggers histamine release from basophils.

• IgG provides the majority of antibody-based immunity against pathogens.

• IgD acts as a receptor for B cells to produce antimicrobial factors.

• IgA prevents pathogen colonization in the muscosa, gut, and respiratory tract.

• IgM eliminates pathogens during the early stages of humoral immunity, before there is sufficient IgG.

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