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Injury, Inflammation, & Repair
Oral Path. Chapter 2
49
Pathology
Professional
02/03/2013

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Term
What are some ways in which our bodies protect us against injury?
Definition
-physical barriers of intact skin and mucosa
-antibacterial activity of enzymes in saliva in tears
-flushing action of saliva, tears, urine, and diarrhea
Term
What is an inflammatory response?
Definition
a nonspecific or innate response to injury
Term
Does the inflammatory response vary throughout the entire body?
Definition
no, it occurs the same way no mater where in the body the injury has occured
Term
Is the inflammatory response only local?
Definition
can be local or systemic
Term
is the inflammatory response acute?
Definition
may be acute or chronic
Term
What can acute inflammation develop in to?
Definition
chronic inflammation
Term
How are inflammatory responses named?
Definition
named by adding "itis" after the tissue involved
Term
What are the cardinal signs of inflammation?
Definition
1.redness
2.heat
3.swelling
4.pain
5.loss of function
Term
What are the microscopic events of inflammation? (10)
Definition
1.injury
2.constriction of microcircultion (to stop bleeding)
3.dialation of microcirculation
4.increase in permeability of microcirculation
5.exudate formation
6.increased blood viscosity
7.decreased blood flow through the microcirculation
8.margination and pavementing of WBC
9.WBC leave circulation and enter tissue
10.WBC ingest foreign and dead material
Term
What is exudate made of?
Definition
-fluid
-proteins from blood
-dead and injured cells
Term
What can the type of exudate tell you?
Definition
the type of inflammation
Term
What is serous composed of?
Definition
-mainly plasma fluid
-proteins
Term
What is serous associated with?
Definition
mild injury
Term
What is purulent?
Definition
-lots of WBC's
-tissue debris
Term
What is purulent associated with?
Definition
acute inflammation
Term
What does mucinous contain?
Definition
lots of mucous secretions
Term
What is fibrinous composed of? What is it?
Definition
large amounts of fibrin, bloody sputum
Term
What do chemical mediators do?
Definition
start or ampifly the inflammatory response
Term
Where do chemical mediators come from?
Definition
the blood, endotheial cells, WBC, platelets, microoganisms
Term
Where is histomine released from?
Definition
mast cells
Term
Where is serotonin released from?
Definition
platelets and acts like histamine
Term
What does the Kinin system do?
Definition
bradykinin acts like histamine and causes pain
Term
What does the fibrinolytic system do?
Definition
plasmin acts to activate clotting mechanism and activate kinin system
Term
Where are protaglandins and leukotrienes released from and what do they do?
Definition
-released from WBC's
-caused continued dialation, pain, and production of MMP enzymes
Term
What do MMP emzymes do?
Definition
induce breakdown of collagen
Term
What are the different cytokins?
Definition
-interleukin-1 (IL-1)
-IL-6
-IL-8
-tumor necrosis factor(TNF)
Term
What do cytokins do? Where are they released from?
Definition
-released by WBC
-cause continued movement of WBC to the area
Term
Histamine, serotonin, kinin system, fibrinolytic system, prostagladins, and leukotrines, and cytokins are all examples of what?
Definition
chemical mediators
Term
Which cells are responsible for acute infmallation?
Definition
neutrophils(PMN), esinophils
Term
How do neutrophil's work in acute inflammation?
Definition
they are the first to arrive and are effective against bacterial & fungal infections
Term
What type of reaction are eosinophils seen in?
Definition
they are seen in hypersensitivity reactions
Term
What kind of cells are seen in chronic infections?
Definition
-macrophages and giant cells
-lymphocytes (T & B)
-fibroblasts and endothelial cells
Term
what do clots form from?
Definition
-mesh of fibrin
-platelets
-RBC
Term
What migrates to the area during clot formation?
Definition
PMN's(neutrophils)
Term
What do macrophages do?
Definition
function to debride area and secrete cytokins(IL-1)
Term
What do cytokins(IL-1) do?
Definition
stimulate growth of fibroblasts and endothelial cells
Term
Healing can be by BLANK or BLANK intention.
Definition
Healing can be by primary or secondary intention.
Term
When is primary intention seen?
Definition
in small injuries, skin is brought back together
Term
When is secondary intention seen?
Definition
with large injuries, more scar tissue formed
Term
What is granulation tissue?
Definition
tissue that forms after inflammatory response
Term
What is granulation tissue made of?
Definition
immature collagen fibers and blood vessels
Term
What are some factors that effect healing?
Definition
-age
-nutritional status
-immune status
-smoking
-local factors
Term
What are restitution, resolution, and regeneration?
Definition
these are a form of repair
Term
What does restitution, resolution, and regeneration help do?
Definition
helps tissue return to normal structure and function, destroyed tissue is regenerated
Term
When does regeneration occur?
Definition
if destruction was not extensive and cells are capable of regeneration
Term
What is fibrous repair?
Definition
repair with scaring
Term
What are some examples of systemic manifestations of inflammation?
Definition
-fever
-leukocytosis
-lymphadenopathy
-elevated C-reactive protein
Term
What are some tissues not capable of regeneration?
Definition
-brain
-cardiac muscle
-skeletal muscle
Term
What are some tissues that are capable of regeneration?
Definition
-epidermis
-gastrointestional epithelium
-bronchial epithelium
-bone marrow
-liver
-kidney
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