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Leukocytes
Morrow 1/19/11 lecture
120
Histology
Undergraduate 4
01/21/2011

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Term
leukocytes
Definition
mobile cells that leave the circulation via margination, pavementing and diapedesis
Term
pseudopodia
Definition
WBC's stick to endothelial cell surface, squeeze between endothelial cells fo capillaries and venules via _______
Term
extravasation (jump through vessel walls)
Definition
another name for diapedesis
Term
rolling and adhesion
Definition
another name for pavementing
Term
chemotaxis
Definition
attracts WBC's to inflammatory sites
Term
leukocytes
Definition
function as active part of immune system in tissues
Term
cytokines
Definition
any cell product that influences another cell
Term
granulocyte, agranulocyte
Definition
initial classification of white blood cells divides them into these two categories
Term
primary granule aka azurophillic (stain blue purple)
Definition
all WBC's have this kind of granule
Term
lysozymes such as acid hydrolases
Definition
primary granules contain what
Term
specific granules aka secondary granules
Definition
granules that only granulocytes possess
Term
lysozyme and alkaline phosphatases (variable staining)
Definition
what secondary granules contain
Term
neutrophils, basophils, eosinophils
Definition
list the granulocytes
Term
all have single multi-lobed nucleus and prominent cytoplasmic granules
Definition
characteristics of all granulocytes
Term
Neutrophils, 40-75%
Definition
most common WBC's (type) and how common (percent)
Term
twice as large 12-14 um
Definition
size of a neutrophil compared to a RBC
Term
polymorphonuclear cells (PMN's)
Definition
name for cells with multilobed nucleus (3-5 lobes)
Term
short lived, several hours or days
Definition
lifespan of neutrophils
Term
mitochondia
Definition
Neutrophils primarily use anaerobic glycolysis, but have a few ____. They are designed to function in a poorly oxygenated environment (damaged areas with dead cells)
Term
neutrophils
Definition
contain inflammatory mediators and complement activators, proteases, defensins, lactoferrin and lysozyme (antibacterial compounds) --released during and inflammatory reaction
Term
Neutrophils
Definition
WBC's associated with ACUTE inflammation
Term
several days
Definition
length of acute inflammation
Term
1 wk - 10 days
Definition
length of subacute inflamation
Term
more than 10 days
Definition
length of chronic inflammation
Term
Neutrophils
Definition
WBC's first to site of tissue damage
Term
rubor, tumor, calore, and dolore (redness, swelling, heat, pain
Definition
cardinal signs of inflammation
Term
neutrophils
Definition
highly motile WBC's
Term
chemotactic factors
Definition
neutrophils are attracted to bacteria and damaged tissue by
Term
neutrophils
Definition
funtion in primary phagocytosis, leasing to formation of phagolysosomes to digest bacteria
Term
opsonization
Definition
enhances phagocytosis by coating bacteria with antibody and complement
Term
respiratory burst
Definition
bacterial killing by generating hydrogen peroxide and hypochlorous acit
Term
barr body (neutrophils)
Definition
inactive X chromosome "drumstick chromosome", seen in this WBC to tell you the patient was female from a blood smear
Term
basophil, less than 1%
Definition
least common of WBC's (name and %)
Term
basophils
Definition
become mast cells when they leave the blood stream and enter tissue
Term
mast cells
Definition
basophils become what when they leave the blood stream
Term
basophils
Definition
14-16 um size, bilobed nucleaus, characterized by large, basophillic, specific granules which can obscure the nucleus
Term
uncertain, probably days
Definition
lifespan of mast cells
Term
comma
Definition
shape of mast cells
Term
hydroltic enzymes (heparin sulfate, chondroitin sulfate, histamine, leukotrienes (SRS, ECF)
Definition
whats inside specific granules of basophils (examples)
Term
an anticoagulant found in specific granules of basophils
Definition
what is heparin sulfate
Term
a proteoglycan found in specific granules of basophils
Definition
what is chondroitin sulfate
Term
histamine
Definition
vasoactive amine that increases vasodilation and vasopermeability, found in specific granules of basophils
Term
slow reacting substance of anaphylaxis (SRS)
Definition
leukotriene that causes smooth muscle contraction in asthma found in specific granules of basophils
Term
eosinophillic chemotactic factor
Definition
leukotriene that attracts eosinophils, found in specific granules of basophils
Term
degranulation
Definition
release of granule contents into ECS
Term
basophils
Definition
Used in type 1(immediate) hypersensitivity reactions
Term
asthma, hayfever and some allergic dermatitis
Definition
list some type 1 hypersensitivity reactions
Term
eosinophils
Definition
counteract activity of basophils
Term
eosinophils
Definition
1-6% of WBCs. bilobed nucleus.
Term
8-12 days (circulate 3-6 hrs before entering tissue via diapedesis)
Definition
lifespan of an eosinophil
Term
eosinophils
Definition
have surface receptors for IgE
Term
hydrolytic enzymes (histaminase, Eosinophil peroxidase (EPO), lysosomal enzymes, major basic protein
Definition
examples of eosinophil specific granules contents
Term
histaminase, eosinophils
Definition
neutralizes histamine, found in ____
Term
major basic protein, eosinophils
Definition
neutralizes heparin and kills parasites, found in _____
Term
eosinophils (eosinophilic chemotactic factor)
Definition
chemotactically attracted to eosinophils and neutrophils by ECF
Term
eosinophil derrived inhibitor
Definition
eosinophils release ____ which inhibits basophil and mast cell degranulation
Term
eosinophils
Definition
have antiparasitic function esp against flukes (helminths) and affinity to Ag-Ab complexes
Term
major basic protein of eosinophils
Definition
substance, in addition to subsequent phagocytosis, destroys parasites and Ag-Ab complexes
Term
eosinophils
Definition
if a dog or cat has round worm it will have a lot of what
Term
monocytes, lymphocytes
Definition
name the agranulocytes
Term
agranulocytes
Definition
WBCs that have a single, unlobed nucleus, and lack specific granules, but have azurophilic granules
Term
Monocytes, 16-20 um
Definition
largest of WBCs (size)
Term
Definition
list the WBC's in increasing size?
Term
Definition
list WBC's in increasing lifespan
Term
monocytes
Definition
abundant gray-blue/lavender cytoplasm, large indented (kidney bean shaped) nucleus
Term
several months
Definition
lifespan of monocytes
Term
2-3 days, monocytes
Definition
present in blood stream ____ days then enter tissue to become macrophages
Term
histiocytes
Definition
another name for macrophages
Term
Kupfer cells
Definition
fixed tissue macrophage in the liver
Term
microglial cells
Definition
fixed tissue macrophage in the CNS
Term
Langerhan's cells
Definition
fixed tissue macrophage in the skin
Term
dust cells
Definition
fixed tissue macrophage in the lungs
Term
osteoclasts
Definition
fixed tissue macrophage in the bone
Term
monocytes
Definition
highly mobile WBC's that contain abundant hydrolytic enzymes, phagocytic
Term
monocytes
Definition
WBC active in subacute to chronic infections along with lymphocytes
Term
monocytes
Definition
can fuse together to become multinucleated epithelioid giant cells in chronic granulomas (such as TB)
Term
monocytes
Definition
function as Ag presenting cells in lymphoid organs -> bring back bits of antigen like a police dog or go-between (pimps introduce johns to hookers)
Term
subacute-chronic
Definition
what kind of infections lymphocytes are involved in
Term
days to years
Definition
lifespan of lymphocytes
Term
2, no
Definition
how many size classes of lymphocytes are there, and do they correlate to cell types?
Term
lymphocytes
Definition
characterized by round, densely staining nucleus, surrounded by thin rim of cytoplasm
Term
lymphocytes
Definition
re-circulating, immunocompetent cells, primary cell of immune system (antigen police)
Term
20-45
Definition
percent WBC's that are lymphocytes
Term
t cells 90%, b cells 4-10%
Definition
types of lymphocytes and abundance (%)
Term
B-cells
Definition
first recognized in Bursa of Fabricius of birds
Term
bone marrow
Definition
where B-cells are formed and become immunocompetent
Term
B cells
Definition
produce antibodies
Term
B cells
Definition
function in humorally mediated immune response
Term
plasma cells, amplification/clonal expansion
Definition
B-cells produce ___ after encountering Ag through what process
Term
memory cells/effector cells
Definition
long lived cells that do not replicate, function in anamnestic response of humoral immunity (premise of vaccination)
Term
usually only 1
Definition
how many Ab's to B cells specify for
Term
B cells
Definition
like macrophages, ___ can function as Ag presenting cells
Term
2
Definition
B cells have HLA type _ surface markers and surface immunoglobulins.
Term
HLA (human leukocyte Ag) type 2
Definition
MHC (major histocompatibility complex) marker on B cells
Term
formed in bone marrow, mature in thymus
Definition
where are T-cells formed and mature?
Term
T-cells
Definition
cell mediated immunity, long lived
Term
paratopes
Definition
T-cell receptors on surface (like Antibodies)
Term
epitopes
Definition
recognized by T-cell (another name for recognized part of Ag of foreign proteins)
Term
CD (cluster of differentiation) determination molecules
Definition
molecules present on surface of T-cells that recognize HLA receptors on surface of other cells (self vs non-self).
Term
cytotoxic, supressor, helper, null
Definition
4 types of T-cells
Term
cytotoxic/killer t-cells (Tc/Tk)
Definition
tend to be large lymphocytes, primary effectors in cell-mediated immunity
Term
killer T cells
Definition
recognize cells with foreign surface Ag's or receptors and kill them by punching holes in Plasma Membranes
Term
helper T cells (Th)
Definition
secrete lymphokines
Term
helper T cells
Definition
detect invaders, sound chemical alarm, recognize antigen usually presented by macrophage or b cell
Term
lymphokines
Definition
pheremones that stimulate b cells to produce antibodies, or killer t cells to kill
Term
supressor cells (Ts)
Definition
supress activity of b cells, and dampen immune response (especially to self molecules)
Term
autoimmune diseases
Definition
result when antibodies are made to own proteins due to loss of control of Ts cells
Term
null cells
Definition
lymphocytes which posess Fc receptors but lack specific surface markers of b or t cells
Term
null cells
Definition
class of T cell that includes Natural killer cells, and possibly peluripotential stem cells
Term
null cells
Definition
responsible for non-specific cytotoxicity against virus infected and tumor cells
Term
null cells
Definition
can attack "self" cells ex: tumors
Term
null cells
Definition
function in ADCC (ab dependent, cell mediated cytotoxicity
Term
Never let monkeys eat bananas
neutrophils, leukocytes, monocytes, eosinophils, basophils
Definition
concentration of WBC from high to low
Term
CBC complete blood count
Definition
tells absolute number of WBC's
Term
differential cell count
Definition
tells relative percentages of WBC's, costs $2 more
Term
infection/tumor
Definition
increase WBCs indicates what
Term
WBC
Definition
type of ___ tells you stage of inflammatory response and type of infection
Term
acute, bacteria
Definition
increased neutrophils (neutrophillia) means what stage of infection and what kind
Term
subacute, viral
Definition
increased lymphocytes (and monocytes (mononucleosis)) means what stage of infection and what kind
Term
immune suppression/tumor
Definition
decrease WBC's (lymphopenia) tells what
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