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30 Cards in this Set
- Front
- Back
Names the structures that ensure the one way flow of lymph through the node?
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Valves in the Afferent & Efferent Lymphatic
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why is there fewer efferent than afferent lymphatic associated with lymph nodes? |
It slows the flow lymph through the node allowing time for immune cells & macrophages to respond to foreign substances present in the lymph |
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which cell type is found in greatest abundance in the germinal centers?
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B lymbphocytes
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what is the function of their daughter cells, the plasma cell?
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they produce & Release antibodies |
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what is the major cell type in cortical areas other than the germinal centers?
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T Lymbphocytes |
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the third important cell type in lymph nodes (usually found clustered around medullary sinuses) are the ? these cells act as ? |
Macrophages, phagocytes
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lymph nodes
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monitor composition of lymph |
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fibrin mesh
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wall off the area of injury
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increased blood flow
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accounts for redness & heat in an in flamed area
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spleen
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a blood reservoir
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neutrophils
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first phagocytes to migrate into the injured area
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diapedesis
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leukocytes pass through the wall of a capillary
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macrophages
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phagocytic off spring of monocytes |
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edema
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results from accumulation of fluid leaked from the blood stream |
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chemotaxis
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cellular migration directed by a chemical gradient |
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histamie
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inflammatory chemical released by injured cell
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thymus
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located between the lungs at the base of the throat
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name three body regions of the largest collections of lymph nodes are found?
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cervical, axillary, inguinal |
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inflammatory chemical
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promote release of white blood cells from the bone marrow |
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peyer's Patches
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collectively called malt & prevents bacteria from breaching the intesting wall
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initial response to on antigen, gearing-up stage
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primary
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a log period of several days occurs before antibodies specific to the antigen appear in blood stream
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primary
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antibody levels increase rapidly and remains high for an extended period
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secondary
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immunological memory is established |
primary
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the second, third and subsequent responses to the same antigen
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secondary
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binds with are releases chemicals that activate B cell, T cell, macrophages
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helper T cell
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activated by recognizing both its antigen & a self protein presented on the surface of a macrophage
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helper T cell
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turns off the immune response when in "enemy has been routed" |
regulatory T cell
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directly attacks and lyses cellular pathogens
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cytotoxic T cell
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initiates secondary response to a recognized antigen |
memory T cell
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