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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?
Valves in the Afferent & Efferent Lymphatic

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
which cell type is found in greatest abundance in the germinal centers?
B lymbphocytes
what is the function of their daughter cells, the plasma cell?

they produce & Release


antibodies

what is the major cell type in cortical areas other than the germinal centers?

T Lymbphocytes

the third important cell type in lymph nodes (usually found clustered around medullary


sinuses) are the ? these cells act as ?

Macrophages, phagocytes
lymph nodes

monitor composition of lymph
fibrin mesh
wall off the area of injury
increased blood flow
accounts for redness & heat in an in flamed area
spleen
a blood reservoir
neutrophils
first phagocytes to migrate into the injured area
diapedesis
leukocytes pass through the wall of a capillary
macrophages

phagocytic off spring of


monocytes

edema

results from accumulation of


fluid leaked from the blood stream

chemotaxis

cellular migration directed by a chemical gradient

histamie
inflammatory chemical released by injured cell
thymus
located between the lungs at the base of the throat
name three body regions of the largest collections of lymph nodes are found?

cervical, axillary, inguinal



inflammatory chemical

promote release of


white blood cells


from the bone marrow

peyer's Patches
collectively called malt & prevents bacteria from breaching the intesting wall
initial response to on antigen, gearing-up stage
primary
a log period of several days occurs before antibodies specific to the antigen appear in blood stream
primary
antibody levels increase rapidly and remains high for an extended period
secondary

immunological memory is


established

primary
the second, third and subsequent responses to the same antigen
secondary
binds with are releases chemicals that activate B cell, T cell, macrophages
helper T cell
activated by recognizing both its antigen & a self protein presented on the surface of a macrophage
helper T cell

turns off the immune


response when in


"enemy has been routed"

regulatory T cell
directly attacks and lyses cellular pathogens
cytotoxic T cell

initiates secondary response to a


recognized antigen

memory T cell