LN 05 (Inflammation and Repair) Flashcards
leucocytes that appear in marginal plasma
margination
leucocytes adhering to walls after margination
adherence
more leucocytes
adhere to the walls until the luminal
surface of the wall become covered
with a layer of leucocytes
pavementing
migration in tissues is accomplished by
pseudopodia
What attract the leucocytes to migrate to the injured site are
chemical mediators of inflammation in a process called
chemotaxis
can move through fibrin and past tissue cells to their destination
polymorphs or granulocytes/ neutrophils and eosinophils
chemical messengers that act on vascular endothelia and leucocytes to
contribute to an inflammatory reaction
autacoids
may be performed and stored as
granules in cells (e.g., histamine and cationic proteins) or newly synthesized by cells
cell or tissue derived
three major mediator producing system in plasma
- coagulation-fibrinolytic
- kinin system
- complement system
generated by consequent or multiple enzymic
steps involving sequential activation of molecules by limited proteolysis
peptide mediators
eicosanoids
lipid mediators
derived
from the action of phospholipase to membrane phospholipids through
the arachidonic acid pathways
lipid mediators
2 arachidonic acid pathways
lipoxygenase and cyclooxygenase
pathways
enzymes which activates leukotriene B4
hydrolase
activate leukotriene A4 to B4
glutathione transferase
leukotrine C4 to D4
glutamyl transpeptidase
leukotrine D4 to E4
cysteinyl glycinase
Bradykinin,Prostaglandin E1 and E2, Leukotriene B4, C3 and C5 fragments of
complement, and Thromboxane
vasodilators
Histamine, Serotonin, Bradykinin, Kallikrein, Platelet
Activating Factor, Lymphokines, Anaphylatoxin (C3 and C5 fragment of
Complement), Leukotriene B4, C4 and D4, 5-HPTES
vasopermeability
neutrophils mediators
C5a fragment of Complement, Leukotriene
B4, Bacterial toxins, and Platelet Aggregating Factor
monocyte and macrophages chemotactic agents
e C5a fragment of Complement,
Leukotriene B4, Bacterial toxins, Cationic protein fractions of neutrophils,
Lymphokines, and Fibrin degradation product
attracts eosinophils
chemotactic factor of anaphylaxis (ECF-A) derived from mast cells, and prostaglandin D2
primarily a clear fluid that is low in protein that
exudes from serosal or mucosal surfaces following mild irritation
serous exudates
initial exudates seen in many
inflammatory reactions, and should neutrophils be present, it imparts a whitish tinge to the exudates.
serous exudates
severe vascular injuries where a fluid rich in fibrinogen is produced
fibrinous exudates
commonly seen in mucosal and serosal
surfaces, most notably in the intestines, pleura, peritoneum, and synovial
membranes
fibrinous exudates
When the body and organ surfaces have fibrinous exudates, the fibrous
organization of the exudates forms
adhesion
severe mucosal
damage where the epithelia are lost, the fibrin that accumulates may become
tightly adherent to the underlying tissue forming what is known as
diphtheritic
membrane or pseudomembrane
applies to fibrinous
organization of any necrotic exudates on a mucosal surface
diphtheric
solid clumps of long delicate eosinophilic strands
fibrin
when sanguineous exudates coupled with a thin fluid where it imparts a red tinge color
serosanguineous exudates