14 terms

types of leukocytes

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neutrophils
most abundant circulating wbc. 4k per microliter. usually first to arrive at infection, emigration, (+) chemotaxis, limited phagocytic, fill up with pathogen.
neutrophils secrete
defensive compounds. defensis and oxidant toxins
defensins
poke holes in membrane of pathogen, ruptures
oxidant toxins
damage and kill pathogen
eosinophils
emmigration, (+) chemotaxis, small amount phagocytic. 165 per microliter
eosinophils secrete
histamines and digestive enzymes
histamines
inflammation
digestive enzymes
release these enzymes on parasite, digest it
basophils
44 per microliter. emmigration, most basophils are in tissue, (+) chemotaxis, almost no phagocytosis.
basophils secrete
heparin and histamines
heparin
anticoagulant
lymphocytes
2k per microliter. emmigration, can move back and forth between blood and tissues. (=) chemotaxis, no phagocytosis. specific immunity. provides memory or immunity to pathogen after initial exposure.
lymphocytes types
t cells and b cells
monocytes
450 per microliter. emigration, move into tissue and converts in macrophages, (=) chemotaxis, phagocytic (agressive and unlimited). some of these in specific tissues such as lung, skin, gi tract, bone marrow, spleen, lymph nodes and liver