Details Title: 19 - Lymphatic and Immune Description: na Total Flash Cards: 33 Created: 04/26/2009 20:29:56		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Anatomy Flashcards
Cards in this set: Term lacteals Definition specialized lymphatic capillaries in intestinal mucosa Term chyle Definition fatty lymph that comes through lacteals Term right lymphatic duct Definition this duct drains lymph from right upper arm and right side of head/thorax Term thoracic duct Definition this duct receives lymph from rest of body other than (right upper arm and right side of head/thorax) Term T-lymphocytes Definition lymphocytes that directly attack and destroy infected cells Term B-lymphocytes Definition lymphocytes that produce plasma cells that secrete antibodies into blood Term dendritic cells Definition these cells capture antigens and bring them to lymph nodes Term reticular cells Definition these cells produce reticular fiber STROMA, which is network that supports the other cell types in lymphoid organs Term buboes Definition right term for "swollen glands" Term reticular connective tissue Definition lymph organs made of ____________ tissue Term white pulp Definition areas composed mostly of lymphocytes in spleen suspended on reticular fibers are called _______ Term thymus Definition where t-lymphocytes become immunocompetent Term tonsillar crypts Definition invaginations of epithelium in tonsils which trap bacteria pushing them toward lymphoid tissue Term Peyer's patches Definition large isolated clusters of lymphoid follicles located in small intestine; destroy bacteria, generate memory lymphocytes Term Natural killer (NK cells) Definition these cells of immune system police the body and blood and lymph and kill cancer cells and virus infected body cells before adaptive immune system is activated Term interferons Definition proteins secreted by cells that help protect other cells that have not yet been infected; they "interfere" with viral replication Term complement Definition proteins that destroy foreign substances in body by activating lysis Term Macrophages, Neutrophils, Eosinophils Definition 3 things that engulf pathogens Term pyrogens Definition things that induce fever Term humoral immunity Definition this type of immunity is provided by antibodies present in the body's fluids Term immunogenic Definition ability to stimulate profilferation of specific lymphocytes and antibodies Term Haptogens Definition small antigens that only elicit a response when bound to larger proteins Term antigenic determinatants Definition specific part of an antigen that is immunogenic Term MHC Proteins Definition these proteins “present” other antigens to the immune system for evaluation Term Antigen Presenting Cells (APCs) Definition Engulf or trap antigens Present them on their surfaces using MHC Term positive selection Definition Development of ‘Self-tolerance; identifies t cells whose receptors are capable of recognizing self-mhc molecules Term negative selection Definition identifies t cells that do not react vigorously to self antigens Term Somatic Recombination Definition How is diversity in antigen receptors generated? "lego set" example; genes shuffled and combined in different ways Term neutralization Definition simplest effector mechanism; occurs when antibodies block specific sites on viruses or bacterial exotoxins; virus loses its toxic effect b/ it canot bind to receptors on tissue cells Term agglutination Definition this process clumps antigens together Term precipitation Definition soluble molecules are cross-linked into large complexes that settle out of solution Term T Cell Activation Definition T Cell Activation - LEARN ABOUT IT!! Term Cytotoxic T Cells Definition only t cells that can directly attack and kill other cells