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Waveform Audio File Format  |  1997-11-21  |  327.0 KB  |  1 channel  |  22,050 sample rate  |  15 seconds
Transcription: Memory cell. A dormant lymphocyte that is cloned from the stimulation of a B lymphocyte. Once activated by a specific antigen, the memory cell undergoes clonal expansion to form more memory cells and antibody-producing plasma cells.