Among the last line of defenses against prolonged exposure to an extracellular pathogen is

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Quizplus · Accepted Answer

Antibody production by plasma cells is a critical last line of defense against prolonged exposure to an extracellular pathogen. Antibodies can neutralize or eliminate pathogens, and they can also activate complement to kill pathogens. The other options listed (lysozyme production, phagocytosis by neutrophils, histamine release by basophils, and conversion of helper T cells to memory helper T cells) are all important components of the immune response, but they may not be sufficient to fully eliminate the pathogen on their own.

Among the Last Line of Defenses Against Prolonged Exposure to an Extracellular