Column A Column B 1. expresses CCR7 and has a low threshold for activation a. naive T cell b. Трн сеll 2. potentially cytotoxic and bears IL-7 receptor c. central memory Тcell (TCM) 3. expresses CD45RA and has a high threshold for activation d. memory CD8 T cell e. effector memory Тcell (TEM) 4. lacks L-selectin and CCR7 and recirculates to non-lymphoid tissues 5. participates in efficient cognate interactions with memory B cells

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