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Biology 9 Online
OpenStudy (anonymous):

During a humoral immune response, which of the following happens when a pathogen is recognized? Memory B cells divide to form plasma cells that surround the pathogen. The antibodies on B cells bind to the antigens on the pathogen’s surface. Memory T cells produce helper T cells that search for the pathogen and destroy it. Helper T cells signal cytotoxic T cells to attack cells infected by the pathogen.

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