Effector B and T cells generated in the secondary lymphoid tissues account for the two major cell types participating in adaptive immune responses of humoral and cellular immunity, respectively. As the cells of the immune system develop, they acquire molecules that are important for their function. These specific functional molecules are referred to as âlineage markersâ because they identify the cell lineage for example: â¢ myeloid cells â polymorphs and monocytes; â¢ lymphoid cells â T and B cells.
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Parts of Plumas Countyâs territory were given to Lassen County in 1864. The population of Plumas County, as of the year 2000, was 20,824. The county seat is Quincy. The only incorporated city in the county is Portola. In the entire county, there are just three stoplights â two at Quincy intersections and one at a Portola intersection. According to the U.S. Census Bureau, Plumas County has a total area of 2,613 square miles.