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34 Cards in this Set
- Front
- Back
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Swelling of tissue due to accumlation of interstitial fluid is termed __________.
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Edema
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What mechanisms aid the flow of lymph?
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Respiratory pump, contraction of skeletal muscle, larger lymphatics have smooth muscle that contracts.
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What lymph tissues filters lymph?
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Lymph nodes
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What ate the 2 main immunocompetent cells?
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B cells and T cells.
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What are the cells which secrete antibodies?
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Plasma cells
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What are the two main APCs?
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Macrophages & dendrite cells
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Which portion of a lymph node has germinal centers located in follicles?
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Cortex
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What type of cells are typically found in the cortex?
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B cells, T cells, dendritic cells
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What type of immune cells are primarily located in the medulla in sinuses?
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Macrophages
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What do the germinal centers represent?
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Areas of rapid B cell proliferation
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What type of immune cell continuously circulates through the lymph and blood.
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T cells
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How does lymph enter and leave the node?
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Enters by afferent vessels and leaves by efferent at hilum
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What are lymph sinuses?
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Expanded lymph capillaries in the medulla spanned by reticular fibers. Site of macrophages.
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Lymph nodules located in the walls of the pharynx are termed tonsils. Tonsils appear as swelling of the mucosa. Which tonsils are located in the posterior wall of the nasopharynx, and are commonly removed in a tonsillectomy?
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Pharyngeal tonsils
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Which tonsils are located at the posterior aspect of the oral cavity, are the largest of the tonsils, and are most commonly infected?
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Palatine
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Which tonsils are located at the base of the tongue?
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Lingual
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What are tonsillar crypts?
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Invaginations of the tonsils where the capsule is interrupted.
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What lymphoid organ is the site of differentiation of lymphocytes into "T cells" and T cell selection?
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Thymus
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Where does T cell selection occur?
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In the thymic corpuscles
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What chemical signal molecules are secreted by the thymus gland?
What are the action of these two signals? |
Thymosin & Thymopoietin
Stimulate immunocompetency and proliferation |
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What lymphoid organ is located in the left hypochondrium, has the basic structure of a lymph node, and filters blood rather than lymph?
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Spleen
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What is the white pulp of the spleen?
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Areas composed of reticular fibers where lymphocytes reside.
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What is red pulp?
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All remaining slenic tissue
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Where is the thymus gland located?
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Inferior neck to superior thorax. Partially overlies the heart.
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Does the thymus have follicles?
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No, because it does not contain B cells.
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What sells become immunocompetent in the thymus?
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T cells
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What are Peyer's patches?
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Aggregates of lymphoid follicles in the wall of the distal small intestines.
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Where else is lymphoid tissue found in the GI Tract?
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Appendix and tonsils
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What is MALT?
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Mucosa associated lymphoid tissue in the mucosal lining of the respiratory tract and the genitourinary tract.
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Is innate immunity specific or nonspecific?
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Nonspecific
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Identify the innate forms of immunity.
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Surface barriers (skin, mucous membranes), phagocytes, NK cells, imflammation, antimicrobial proteins, fever
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What types of cells are phagocytes?
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Macrophages, neutrophils, esinophils
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What subcellular organelle joins the vesicle formed during phagocytosis?
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Lysosome
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What are the 3 main classes of cells recognized by NK cells?
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Virus infected, cancer cells, and antibody coated cells.
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