What are activated lymphocytes?
lymphocytes are a type of white blood cells primarily involved in the fight against foreign pathological substances that ripen and evolve in the lymphatic organs such as bone marrow and brake gland. A large number of lymphocytes can also be found in the spleen and lymph nodes, as well as in other lymphatic tissues at the basic stations throughout the human body. There are three types of principle of activated lymphocytes, which are B-lymphocytes, T-lymphocytes and natural killer cells (NK). B-lymphocytes and T-lymphocytes are commonly referred to as B cells and t cells. Together, these cells form an arsenal of the immune system.
Immunity mediated by antibody is directly related to B-cells in which the B-cell produces a copy of one type of antibody, the molecule acts as a surface receptor on a cell that binds with the antigen specific itself. Once the binding occurs, the cell is activated and the antigen is divided into peptide parts, which are then displayed on cells. Activated lymphocytes of type b cells pThe outgoing division of mitotic cells brings accurate clones. Each clone of B cells generates antibodies specific to a particular antigen that activated B-lymphocyte of origin.
t cells are activated lymphocytes necessary for cellular immunity mediated by cells in which T-lymphocytes act to destroy cells that recognize as infectious or abnormal, as in cancer cells. Each cloned t cell has many receptors that are identical alone that bind only to one specific antigen. These cells are activated to attack recognition as soon as degraded peptide fragments are represented in a specific way on the cell surface. Auxiliary T cells are produced, which then leave lymph nodes to the infection area to attack infectious cells. Cytokines that serve as signals for immune answers are produced by auxiliary T cells in the form of interleukins, factors of necrosis of tumors and interferons that release macrophages.
natural killer cells are also activated lymphocytes important for destruction of various infectious substances such as bacteria, fungi and viruses. Activated primarily by releasing cytokines, NK cells are derived from the division of T-lymphocytes and are sometimes called "killer t cells". When the murderer cells deal with antigen on the surface of the infected cells, granules containing cytotoxic proteins are released that attack and kill the cell. After the infected cell is found, the NK cell moves to identify another infectious agent.