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.
Also called beta cell. a cell in the islet of Langerhans that produces and secretes insulin.
B cell n.
See beta cell.
A type of lymphocyte that, when stimulated by a particular antigen, differentiates into plasma cells that synthesize the antibodies that circulate in the blood and react with the specific antigens. Also called B lymphocyte.
Any of the lymphocytes that develop into plasma cells in the presence of a specific antigen. The plasma cells produce antibodies that attack or neutralize the antigen in what is called the humoral immune response. B cells mature in the bone marrow before being released into the blood. Also called B lymphocyte. Compare T cell.
Benvenuto [ben-vuh-noo-toh,, -nyoo-;; Italian ben-ve-noo-taw] /ˌbɛn vəˈnu toʊ,, -ˈnyu-;; Italian ˌbɛn vɛˈnu tɔ/ (Show IPA), 1500–71, Italian, metalsmith, sculptor, and autobiographer. Contemporary Examples Before Cellini, memoirists tended to restrict themselves to professional accomplishments and philosophy. The First Celebrity Tell-All Nathaniel Rich September 21, 2010 There is no shortage of boasting in Autobiography, but Cellini is […]
Beatrice [be-ah-tree-che] /ˌbɛ ɑˈtri tʃɛ/ (Show IPA), 1577–1599, Italian parricide whose life is the subject of various novels and poems. a verse tragedy (1819) by Shelley. Historical Examples In the lane opposite, the Palace of the Cenci can best be seen; this part has not been restored. Rambles in Rome S. Russell Forbes “It is […]
- B chain
b chain B chain n. A polypeptide component of insulin containing 30 amino acids, the composition of which is species-specific.
- B chromosome
a type of densely staining chromosome of uncertain biological function, found in many plant and animal species.