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Pathophysiology
Week 2 Chapter 2
110
Pathology
Undergraduate 2
09/09/2009

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Term
defense mechanism can be ______ or ______ specific defenses
Definition
non-specific or specific
Term
describe non specific defenses
Definition
first line of defense, defends against all incoming pathogens.
Term
define antigen
Definition
foriegn substance to the body
Term
examples of non specific barriers
Definition
mechanical barriers(skin)
Phagocytes or Macrophages(vulture cells)
Inflammation
Term
What are the two types of phagocytosis
Definition
marcphages and neutrophils
Term
define imflammation
Definition
a series of events that limit the effects of injury
Term
The charachteristics of specific defense in the body
Definition
atigen specific
systemic
and memory
Term
define systemic
Definition
body wide
Term
define memory of antegins
Definition
remembers antegin for later exposures
Term
the chain of blood
Definition
leftventrical artieries asterio;es cappilary beds venules veins right atrium of heart
Term
the hydrostatic process
Definition
pushing force
Term
where is the hydrostatic pressure high
Definition
arteriole end of the capillary bed
Term
define osmotic pressure
Definition
the pulling force
Term
what type of defense mechanism is inflammation
Definition
normal and non specific
Term
the intention if inflammation
Definition
to localise and remove the injurious agent
Term
the signs and symptoms of inflammation serve as a __________
Definition
warning
Term
infection wlawys requires the presence of an
Definition
microorganism
Term
types of inflammation without microorganisms
Definition
allergy or burn
Term
inflammation in a infection will subside when
Definition
the microorganism is removed
Term
what is inflammation a non specific defense too
Definition
tissue injury
Term
what is the fifth not always included sign of inflammtion
Definition
loss of function
Term
disorders that involve inflammation always end in ______ and involve the ______ word of the body part or tissue
Definition
itis, root
Term
the causes of inflammation
Definition
direct damage(cuts and sprains)
chemicals
Ischemia
Cell necrosis
allergic reactions
foriegn bodys
physical agents (burns)
Infection
Term
the inflammatory process in general is the _______ regardless of the ________
Definition
same, cause
Term
The ________ of inflammation is dependent on the cause
Definition
timing
Term
when tissues are injured the _____ cells of the tissues release _____ ______
Definition
mast, chemical mediators
Term
eaxamples of chemical mediators
Definition
histamines
serotonin
prostaglandins
leukotienes
Term
Mediators affect _____ ____ and ____ in damaged areas
Definition
blood vessels, nerves
Term
what are cytokines
Definition
communicators in the tissues that send messages to activate the lmyphocytes and the macrophages also the hypothalmus.
Term
what does the hypothamlmus regulate in the body
Definition
temperature
Term
what do histamines do
Definition
causes vessels to get larger an capillary permibiality to increase
Term
leukotrienes and prostoglandins do what
Definition
pronlong inflammation
Term
Why aren't leukotrienes and prostoglandins immediately available
Definition
need to be synthesized
Term
what happens immediately upon injury
Definition
nerve reflexes cause immediate and transient vasconstriction
Term
why does vasoconstriction occur
Definition
to stop bleeding
Term
what happens second in an injury
Definition
damaged cells release chemical mediators which cause vasodilation and capillary permiabilty
Term
the protections after injury
Definition
1 blood clots
2 plasma protiens (globulins) move into intersistual space and act as antibodies
Term
what are leukocytes
Definition
white blood cells
Term
leukocytes are _____ to area of injury by ______ ______
Definition
attracted, chemical mediators
Term
the process by which leukocytes are attracted to the injury by chemical mediators is called
Definition
chemotaxis
Term
what is margination
Definition
when the neutrophls and later manocytes and macrophages collect along the capillary walls
Term
neutrophils, manocytes and macrophages emigrate out of the capillaries and cosume foriegn substances, cell debris, microorganism by phagocytosis this is called
Definition
diapedisis
Term
if there is excessive fluid and protien accumalation in the intersitual spaces
Definition
the blood flow to the area will be greatly reduced
Term
why is decreased blood to an area not good
Definition
decreases nutrients to undamaged cells and decreases removal of wastes
Term
we have naturally occuring control mechanisms which will release of _____ ____ so _______ is not prolonged
Definition
chemical mediators, inflammation
Term
what causes redness of inflammation
Definition
increased blood flow
Term
what causes pain in inflammation
Definition
chemicals , and pressure from swelling on nerves
Term
what causes the heat of inflammation
Definition
increased blood flow
Term
what causes the swelling of inflammation
Definition
increased capillary permeability
Term
what are exudates
Definition
a collection of intersitual fluid forms in an inflamed area
Term
the characteristic of the exudate depends upon the
Definition
trauma
Term
what is a serous exudate
Definition
waatery- lots of fluid- very few white blood cells and protiens.
Term
serous exudate cause
Definition
allergic reactions or burns
Term
what are fibrous exudate
Definition
thick sticky high cell content lots of fibrin
Term
what does the precense of fibrous exudate increase the risk of
Definition
scar tissue
Term
Purelant Exudate
Definition
thick yellowish contains lots of white blood cells, cell debris, microorganisms
Term
what does purelant exudate indicate
Definition
bacterial infection
Term
describe abcess
Definition
a localized pcket of purlent exudent in solid tissue
Term
Homorrhagic Exdudate
Definition
contains blood usaually only in area when vessels are damaged
Term
general manifestations of inflammation
Definition
fever
malaise
fatigue
headache
anorexia
Term
how is fever beneficial to the body
Definition
it impairs the growth and reproducionof microorganisms
Term
fever can be high if caused by
Definition
infection
Term
fever is caused by a release of _____ into the blood stream
Definition
pyrogens
Term
what do the pyrogens turn on to higher the body temperature
Definition
hypothalmus
Term
when the body tries to heat itself the body begins to
Definition
shiver
blood vessels vasoconstrict
voluntarily ball the body up to conserve heat
Term
shiver heats the body because
Definition
the contracting muscles release heat
Term
vasocontriction does what for heating
Definition
keep the heat inside the body causing the skin to be pale and white
Term
when does the body temperature go back to normal
Definition
when the microorganism is gone
Term
how does the body return to normal after fever
Definition
by reversing the vasodiation and shivering
Term
diagnostics test we can do for inflammation
Definition
look for changes in the blood
Term
what do we look for in the blood
Definition
1. leukocytosis- the number of white bloodcelss immature neutroplists shift to the left
2. Differential count- how many of each type of wbc
3. plasma proteins
4.c-reative proteins
5.incerased esr
6. cell enzymes
Term
what does looking at what types of whiteblood cells tell us
Definition
whether it is bacterial, viral, or allergic reaction
Term
what plasma protiens do we look for
Definition
fibrogens and prothrombinwill increase due tot eh liver to synthesis more plasma proteins
Term
when do we find C-reactive proteins in the blood 
Definition
with acute inflammation and cell necrosis we would see c-reactive proteins with in 24 - 48 hours
Term
Increased esr
Definition
elevated plasma protiens increases the rate at which RBC's settle in a sample
Term
cell enzymes
Definition
released from necrotic cells enters tissue fluids adn the blood.
Term
how do cell enzymes tell us the site of inflammation
Definition
the enzymes are specific to cell type
Term
when the exposure to the cause of inflammation is brief the inflammation will subside in
Definition
48 hrs
Term
the amount of tissue nerosis depends upon
Definition
cause of trauma and the the factors that contribute to inflammation
Term
extensive necrosis can result in
Definition
ulcers and erodded tissue
Term
microorganisms can more easily penetrate when
Definition
A MECHANICAL BARRIER IS DAMAGED AND WHEN BLOOD SUPPLY IS IMPAIRED
Term
deep ulcers may develope becasue of
Definition
necrosis
Term
ulcers can lead to ________ of the _______
Definition
preforation, viscera
Term
viscera
Definition
abdominal organs
Term
preforation of the viscera can develope
Definition
extensive scar tissue
Term
inflammmation resulting from sprains, tendinitis, fracture can causeskeletaol muscle to
Definition
spasm
Term
spasms of skeletol muscles can put bones
Definition
out of alignment
Term
bones out of alignment puts pressure on
Definition
nerves
Term
define chronic inflammtion
Definition
when the cause of inflammation is not taken away
Term
can cause chronic inflammation
Definition
chronic irratation
Term
charachteristics of chronic inflammation
Definition
less swelling, less exudates, more lymphocytes and macrophages, more fibroblasts, more tissue destruction
Term
define granulama
Definition
a small mass of cells with nuecrotic centercovered by connective tissue
Term
how does aspirin work
Definition
decreases prostoglandin synthesis at the inflammation site also reduces pain and fever
Term
what is acetylsalicyte acid
Definition
aspirin
Term
what is analgesic
Definition
pain reducer
Term
what is antipyretic
Definition
fever reduces
Term
aspirin may interefer with ___ ____
Definition
blood clotting
Term
acetaminophen works how
Definition
reduces fever and pain does not reduce inflammatory response
Term
what is NSAIDs
Definition
non steriod antiinflammatory drugs
Term
how to nsaids work
Definition
anti-inflammatory, analgesic, antipyretic, reduce the production of prostaglandines
Term
our body naturally makes glucorticoids in the
Definition
adrenal cortex
Term
the benefits of glucocorticooids
Definition
decrese capillary permiability,enhance effects of epinephrine and stablize the vascualr system, reduce the number of leukocytes and mast cells at the injury cite
Term
glucocorticoid can be taking through
Definition
oral, injection, or inhaler
Term
side effects of glucocorticoids are
Definition
Atrophy of lymphoid tissue so reduced wbc's,
Catabolic effects or tissue break down-decreased protein synthesis or tissue regenertion, delayed healing,delayed growth in children, retention of sodium + water which casue swelling and high blood pressure, body makes less natural glucocorticoids
Term
people should be slowly weened from glucocorticoids to
Definition
allow the adrenal cortex time to begin production
Term
what is RICE
Definition
rest ice compression and elevation
Term
ice casues
Definition
vasalcontriction minimises swelling and pain
Term
elevation improves
Definition
the fluid flow away from damaged area
Term
how does compression help inflammation
Definition
reduces vasoconstriction which reduces blood flow
Term
what is resolution
Definition
occurs when there is minimal tissue damage---damaged cells recover
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