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单词 B cell
释义 B cell
 Biol.
  1. Also called B lymphocyte. a type of lymphocyte, developed in bone marrow, that circulates in the blood and lymph and, upon encountering a particular foreign antigen, differentiates into a clone of plasma cells that secrete a specific antibody and a clone of memory cells that make the antibody on subsequent encounters.
  2. Also called beta cell. a cell in the islet of Langerhans that produces and secretes insulin.
 [1970-75; (def. 1) perh. B(one-derived); (def. 2) B(ursa of Langerhans-derived)]
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