BIOC21H3 Study Guide - Lymphatic Vessel, Lymph Node, Mhc Class Ii
Document Summary
Group of cells with mhc ii complexes on their surfaces to allow for lymphocyte stimulation. Antigen presentation is done by a specialized cell surface component mhc ii stimulate t- or b-lymphocyte activation. Mhc ii complexes only used to present what the cell has engulfed outside of itself once cell recognizes it, the cell will proliferate and produce. 1000s of lymphocytes that can recognize the antigen. Kupfer cells: specialized macrophages within the liver. Langerhan"s cells: found within skin (embedded in epidermis); migrate out of skin into lymph vessel and travel to nearest lymph node to activate. Disorganized tissue usually found underneath epithelium in contact with the outside world (e. g. , respiratory system, urinary system) Located at entry points into the body. Mucosal layer of gastrointestinal, respiratory and genitourinary tracts. Often subdivided into: galt gut. Ileum of the small intestine (peyer s patches) found in the exact same spot always. Divide into 1o and 2o nodules: primary nodules mostly composed of small lymphocytes.