During an allergic response, sensitized cells produce in abnormal quantities when an allergen reappears after an initial exposure?

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Study for the VTNE Laboratory Procedures Test. Use flashcards and multiple choice questions, each question offers hints and explanations, enabling increased understanding and retention. Prepare effectively for your exam!

Multiple Choice

During an allergic response, sensitized cells produce in abnormal quantities when an allergen reappears after an initial exposure?

Explanation:
When a person who has been sensitized with an allergen is re-exposed, mast cells (and basophils) that carry IgE on their surface become activated and release histamine in large amounts. This histamine release is what drives the immediate allergic symptoms, such as swelling from increased vascular permeability, itching, and bronchoconstriction. Antihistamines are drugs that block histamine’s effects rather than being produced by the body during the reaction, while toxins and lysins are not involved in the allergic mediator release process.

When a person who has been sensitized with an allergen is re-exposed, mast cells (and basophils) that carry IgE on their surface become activated and release histamine in large amounts. This histamine release is what drives the immediate allergic symptoms, such as swelling from increased vascular permeability, itching, and bronchoconstriction. Antihistamines are drugs that block histamine’s effects rather than being produced by the body during the reaction, while toxins and lysins are not involved in the allergic mediator release process.

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