hematology Flashcards
erythrocytes
transports oxygen and carbon dioxide
neutrophil
kills bacteria by phagocytosis and respiratory burst; engulfs damaged of dying cells
lymphocyte
produces a specific immune response by direct cell attack or via antibodies
monocyte
develops into phagocytic macrophage; triggers specific defenses by presenting antigen to T cell
eosinophil
releases enzymes to destroy parasites; decrease allergic response by engulfing antibody-labelled materials
basophil
releases histamine to trigger inflammatory response; involves in allergic response
thrombocytes
forms plug to seal small tears in blood vessels; releases chemicals that stimulate blood clotting
significance of the erythrocyte’s structure and function
large SA - for gas exchange
stacks - smooth flow through capillaries
flexibility - can bend to make movement through small vessels easier
major components of plasma
90% - water
8% proteins
2% nutrients, ions, gases, wastes, hormones
3 plasma proteins and where it is made
albumins, globulin, clotting factors
made in the liver
leukemia
uncontrolled leukopoiesis
leukocytosis
high WBC count (higher than normal)
leukopenia
doesn’t have enough WBC (lower than normal)
leukopoeisis
formed WBC
why is differential count more useful than a total WBC count?
because it shows discrepancy in the specific WBC to indicate disease or abnormalities
