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Pathotest
exam 1
138
Biology
Graduate
01/03/2012

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Term
metaplasia
Definition
change from one cell to another type
Term
dysplalsia
Definition
cell looks and acts abnormal but the CA yet.
Term
anaplasia
Definition
nuclei, cell structure and mitosis are different and considered cancer
Term
aplasia
Definition
lack of growth did not form the organ or tissue such as someone that is born w/o vertebrae
Term
neoplasia
Definition
independent growth of cells- forms tumor
Term
apoptosis
Definition
programed cell death
Term
hypoxia
Definition
lack of oxygen stops aerobic respiration.
Term
ischemia
Definition
most common cause of cell injury or death. lack of blood/perfusion ex CO poison- hypoxia prior to ischemia
Term
physical agents
Definition
leads to cellular death- burns extreme cold
Term
chemical
Definition
excess of any chemical causes death
Term
infectious agents
Definition
bacteria viruses cause cell death
Term
immune mechanisms
Definition
antibodies attacking antibodies or self attacks self.
Term
genetic derangements
Definition
ex sickle cell anemia
Term
nutritional imbalances
Definition
obesity
Term
Steps following cell death
Definition
the nucleus disintegrates- cells release lysosomes into the tissue- causing inflammation and damage to nearby cells and reduced function.
Term
necrosis
Definition
process of removal of dead tissue. lysosomes start process. Macrophages finish process
Term
coagulative necrosis
Definition
usually found following ischemi. loss of normal organelle structure. ishemia or infaction
Term
liquefactive necrosis
Definition
accumulation of PMN (puss)
usually found with bacterial infection
Term
fat necrosis
Definition
usually found with pancreatic disease that leaks lipases. (come and break down the area)
Term
caseous necrosis
Definition
cheesy! mostly found with TB due to resemblance of cottage cheese.
Term
fibrinoid necrosis
Definition
necrosis that is found in walls of blood vessels w insudation of plasma proteins. Fibrin leaks into the interstitial area
Term
gangrenous necrosis
Definition
caused by infection of ischemic tissue by clostridial perfringens (anaerobic microorganism) this infective agent contains many spreading factors myotoxin, hemolysins and phospholipases that rapidly can lead to amputation or death
Term
escar
Definition
black area of wound
Term
1st line of defense
Definition
mechanical barrier, blocks entry of bacteria or harmful substances into tissues includes tears or saliva to destroy harmful substances
Term
2nd line
Definition
phagocytosis and inflammation-nerutrophils and macrophages to digest harmful substances and debris. Inflammation limints effects of injury. interferons protect uninfected cells from viruses
Term
3rd line
Definition
immune system specific to harmful substance
Term
calor
Definition
heat
Term
rubor
Definition
redness
Term
dolor
Definition
pain
Term
edema
Definition
swelling
Term
functio laeso
Definition
loss of function
Term
steps on inflammation
Definition
injury
initial vasoconstricion
release of chemical mediators
vasodilation- increased blood flow (hyperemia)
increased capillary permiability
WBC's move to site of injury by chemotaxis, diapedesis
phagocytosis- removal of debris in preparation for healing
Term
diapedesis
Definition
when cells migrate across the blook into interstitial area
Term
serous or transudate
Definition
pure water coming across enothelial cells.
Term
exudate
Definition
plasma proteins and water leaking out
Term
serosanginous exudate
Definition
RBC's plasma proteins and water present in interstitium
Term
fibrinous exudate
Definition
thick and sticky w high cell and fibrin content-scar
Term
purulent
Definition
thick yellow-green and contains WBC and cell debris. Typically bacterial infection is present with this type. Pus
Term
abcess
Definition
local pocut of purulent
Term
malaise
Definition
not feeling well
Term
resolution
Definition
minimal damage, damaged cells recover and tissue returns to normal
Term
regeneration
Definition
tissue is able to heal. tissues ability to heal is related to cells ability to replicate
Term
replacement
Definition
extensive damage leading to scarring by connective tissue. Scaring impairs the function of the tissue
Term
partial thickness burn
Definition
involves the epidermis and part of dermis. superficial partial thickness1st degree burns, damages epidermis and upper dermis
Term
deep partial thickness burn
Definition
destruction of epidermis and part of dermis. red, edematous, blistered, hypersensitive during inflammatory stage. dead skin sloughs off and heals by regeneration
Term
full-thickness burn
Definition
destruction of all skin layers and often underlying tissues. dry leathery eschar.
Term
symptoms
Definition
dubjective comments made by the patient
Term
signs
Definition
objective, measurable
Term
etiology
Definition
what causes the diesease
Term
pathogenesis
Definition
how the disease manifest itself
Term
evaluation
Definition
try to determine what the disease is
Term
diagnosis
Definition
the identification of a specific dz through evaluation of S&S. Usually more than one factor is used to diagnose.
Term
prognosis
Definition
what is the liklihood for the patient to handle the disease. Probability for recovery
Term
treatment (intervention)
Definition
Varies with prognosis, what we do to intervene with the patient
Term
examination
Definition
physical observation of the patient
Term
pathogpneumonic
Definition
the one thing about the disease that identifies that disease Hallmark of disease
Term
predisposing factors
Definition
those things that promote development of a dz in an individual. a predisposing factor indicates a high risk for a dz Example asbestos
Term
onset of a disease
Definition
sudden and obvious acute the onset could also be insidious. gradual progression w mild vague signs
Term
acute dz
Definition
short term illness that develops quick
Term
chronic dz
Definition
often milder condition that develops gradually but persists for a long time.
Term
subclinical stage
Definition
pathology occurs but no obvious manifestations are present
Term
latent stage
Definition
silent stage in which no clinical signs are evident. in infection dz, this may be termed the incubation period (time between exposure and onset of S&S)
Term
prodromal stage
Definition
time in early development of a dz that one is aware of changes but S&S are nonspecific. such as fatigue
Term
syndrome
Definition
collection of S&S that occur together in response to a certian condition.
Term
remission
Definition
manifestations of a dz subside
Term
sequelae
Definition
describes the unwanted outcomes of a primary condition
Term
morbidity
Definition
dz rates w in a group
Term
mortality
Definition
the relative number of deaths from a particular dz
Term
epidemic
Definition
higher than expected number of cases of an infectious dz w in a given area
Term
pandemic
Definition
higher number of cases in many regions of the globe
Term
occurrence
Definition
indicated by tracking the prevalence and incidence
Term
prevalence
Definition
the number of new and old or existing cases w in a population and time period
Term
incidence
Definition
number of new cases in a population in a time period
Term
hereditary
Definition
genetic transmission
Term
environmental
Definition
air pollution asbestos
Term
intrinsic (endogenous)
Definition
something that you produce- allergies
Term
idiopathic
Definition
they dont know the cause of the disease process
Term
iatrogenic
Definition
physician induced process. wrong meds, chemotherapy
Term
hypothalamus
Definition
contoll of water walance
Term
osmoreceptor cells
Definition
sense the internal environment by fluid volume and concentration and promote fluid intake
Term
ADH
Definition
antidiuretic hormone. Acts by controlling the amount of fluid leaving the body in urine. ADH promotes resorption of water into the blood from the kidney tubules
Term
aldosterone
Definition
determines resorption of sodium ions and water from the kidney tubules. acts to conserve more fluid when there is a deficit of fluid in the body.
Term
ANP
Definition
atrial naturietic peptide ,this is released by the heart cells to influence workload on the heart by regulating fluid, sodium and potassium levels. AKA will go from the heart to the kidneys to increase filtration rate by reducing the re-absorption of sodium by inhibiting ADH
Term
osmosis
Definition
water wants to move from areas of high concentration to those of low concentration
Term
causes of edema
Definition
increased capillary hydrostatic pressure
loss of plasma proteins
obstruction of lymphatic circulation
increased capillary permeability
Term
Na+
Definition
controlled by Na/k pump.
injested in food lost in feces and urine
controlled by the kidneys via aldosterone
essential in muscle contraction and in conduction of nerve impulses
Term
hypoatremia
Definition
Na deficient
slow nerve conduction velocity
cramps fatigue
decreased BP
confusion
headach
weakness
seizures
Term
hypERnatremia
Definition
weakness afitation
firm subqutaneous tissue
increased thrist
dry rough mucous membranes
decreased urine because ADH is secreted
Term
K+
Definition
ingested in foods and excreted in urine under influence of aldoserone
bannanas, cirtus
insulin helps promote K into the cells
important in muscle contraction and NCV
Term
hypokalemia
Definition
dysrhythmias
weakness fatigue
decreased digestive motility causes anorexia and nausea
respiratory muscle weakness when sever loss
renal fx impaired concentrated urine polyuria
Term
HypERkalemia
Definition
dysrhthmias, muscle weakness progressing to paralysis
fatigue, nausea, and parenthesis
Term
Ca+
Definition
balance is controlled by the parathyroid hormone and calcitonin but influenced by vitiman D and phosphate
food, stored in bone
low Ca stimulates secretion of PTH thus increased Ca absorption from digestive tract, kidneys and promotes resorption from bone
Term
hypocalcemia
Definition
muscle twitching, spasms,tetany
weak heart contractions
arrhythmias
mental confusion
Term
hypERcalcemia
Definition
muscle weakness and tone
lethargy
stupor
personality changes anorexia, mausea
dysrhythmias
kidney stones
polyuria
thirst
Term
control of acid-base is done by
Definition
buffer pairs in blood
respiratory system
kidney regulation
Term
bicarbonate carbonic acid buffer system
Definition
controlled by respiratory system and kidneys. lungs can exhale carious amounts of carbon dioxide by changing respiration rate
kidneys excrete varying ammounts of hydrogen and retain bicarbonate
Term
carbonic acid
Definition
from carbon dioxide and water
Term
bicarbonate
Definition
sodium bicarbonate
Term
acidosis
Definition
pH is below 7.35
causes are due to increased carbon dioxide due to respiratory problems
metabolic acidosis due to decreased bicarbonate due to diarrhea, renal disease
Term
alkalosis
Definition
when pH is above 7.45
respiratory hyperventilation due to anxiety high fever, overdose of asprin, injury
metabolic due to increase in bicarbonate due to vomiting or excessive ingestion of antacids
Term
1st line of defense
Definition
mechanical barrier blocks entry of bacteria or harmful substances into tissues. tears, saliva, skin
Term
2nd line
Definition
phagocytosis and inflammation. neutrophils and macrophages to digest harmful substances and debris. inflammation limits effects of injury. interferons protect uninfected cells from viruses.
Term
3rd line
Definition
immune system. Specific to harmful substance
Term
major Histocompatibility complex or
Human Leukocyte antigens
Definition
membrance proteins on the surface of all cells that tell if self or non-self. Act like a key if it fits then ok, if not then EAT!
Term
antigen
Definition
-any foreign substance that does not have the characteristic cell surface marker (HLA) of that individual. T
Term
neutrophils
Definition
aka polymorphonuclear cells. Derived from bone marrow. Increase in response to infection and inflammation. May damage host tisues during destruction. Dead PMN's=pus. Basically they come in and eat up!
Term
phagocytes
Definition
neutrophils and monocytes Both are WBC's and their function is cell eating. In the lumen it is a monocyte when it is in the interstitial fluid it is a macrophage
Term
monocyte
Definition
circulate in the blood. after neutrophols kill the invading organism, macrophages clear up the debris. both neutrophils and macrophages have receptors for antibodies and complememnt so coating of bugs occurs
Term
Eosinophils
Definition
derived from bone marrow. multiply in both allergic disorders and parasite infestations. when bugs are to big, eosinophils get into close contact and release their contents of granules to kill the bugs
Term
basophils and mast cell
Definition
leukocutes that circulate in the blood and function similarly to mast cells in allergic disorders. mast cells release histamine that dilates blood vessels when released.(mast cells in blood vessels, and called basophils in tissue)
Term
T cells
Definition
Helper T lymphocytes carry microscopic markers located on their surface that identifies them, T4 are helper cells and T8 are the cytotoxic T cells. T4 turns on killer cells and B cells. THey kill nonself by insertion of a protein channel. Suppressor T cells limit immune response. Memory T cells are activated during initial exposure, and can be activated quick with re-exposure.
Term
interleukins
Definition
tupe of cytokine protein released by macrophages to trigger the immune response. is released by macrophages to help the T cells. They function to increase the temperature set point in the hypothalamus. increase serotonin in Bstem and duodenum to cause sleep and nausea. stimulate production of prostaglandins thus leading to decrease in pain threshold. increase systhesis of collagenases reslutes in destruction of cartilage. KICKS THE T4 CELLS INTO ACTION.
Term
B lymphocytes
Definition
migrage throughout the body to increase interaction with antigens. antibody churning machine.
Term
NK cells
Definition
large granular lymphocytes that function to kill viruses, other intracellular microbe-infected cells and tumor cells. Kill w/o prior sensitization or activation.
Term
nonspecific line of defense
Definition
reacts the same every time. no memory of type of invader.
Term
acquired immunity
Definition
specific and involves memory. its job is to recognize and destroy foreign invaders. results when a pathogen enters the body and the body produces a specific response to the invader. So the next time that pathogen tries to invade thy body, it remembers and reacts stronger.
Term
active acquired immunity
Definition
protection by natural or artificial(vaccine) introduction of an antigen into a responsive host.
Term
passive acquired immunity
Definition
antibodies or sensitized lymphocytes produced by 1 person are transferred to another. mom via breast milk to kid.
Term
antibodies
Definition
or immunoglobulins. antibodies attach to an antigen and destroy it. Allows us to immune to various dzs. divided into 5 classes "MADGE"
Term
IgM
Definition
largest immunoglobulin that predominated in initial immune response. involved in blood incompatibility rxn.
Term
IgA
Definition
defends external body surfaces, mucus membrane. found in saliva, colostrum, urine, seminal fluid, tears, nasal fluids, respiratory, GI and GU secretions.
Term
IgD
Definition
attached to B cells and activates B cells
Term
IgG
Definition
is the major antibacterial and antiviral antibody and is the predominant antibody in the blood.
Term
IgE
Definition
primary for parasitic infections. also fxs by activating mast cells and releasing histamine in allergic rxn's anaphylaxis, asthma, urticaria
Term
allograft
Definition
human to human
Term
isograft
Definition
identical twins
Term
autograft
Definition
1 part of body to another
Term
xenograft
Definition
one species to another
Term
type I hypersensitivity rxn
Definition
immediate. allergies, asthma, anaphylaxis, IgE sits on outside of mast cell or basophil, allergen comes into contact and causes IgE to react. if throughout the body then we get an all over body rxn. (anaphalaxis, anasarga)
Term
type II hypersensitivity rxn
Definition
cytotoxic IgM or IgG formed against self specifically on surgace of own body, myasthenia gravas, graves disese (autoimmune)
Term
anaphaylaxis signs and symptoms
Definition
general- malaise, weakness and sense of illness
dermal-hives erythema
mucosal-periorbital edema, nasal congestion and pruititus, flushing, pallor or cyanosis.
respiratory- sneezing, rhinorrhea, dyspnea
upper airway- hoarsness, stridor, tongue and pharyngeal edema
lower airwayp dyspnea, asthma
GI- incresased peristalsis, vomiting, dysphagia, nausea
CV-tachycardia, dysrthymia hypotension, cardiac arrest
CNS- anxiety, seizures.
Term
myasthenia gravis
Definition
efects females more. pathogenesis this is a type II hypersensitivity. Antibody formed against acetylcholine receptors in skeletal muscles,
Prognosis-slow progressive disease with exacerbation and remissions
Term
type III HYPER
Definition
immune complex dzs forms antibodies on something floating in the body not on the surgace. Antibody attaches to another antibody. leads to inflammation. RA, lupusm glomarular nephritis, vasculitis
Term
Type IV
Definition
nothing to do with B cells, related to T cells and macrophages. The body overreacts to antigen Latex
Term
RA
Definition
etiology unknown. type three hypersensitivity. Primarily IgM-IgG comlex. Wherever this complex lands, destruction of tissue
Term
systemic lupus
Definition
etiology, unknown but factors known are related to hormones, genetic, and environmental. Tupe III hypersensitivity develop antibodies against DNA which damage cells via complement activation.
Term
Delayed type IV
Definition
antigen processed in macrophage, antigen recognition and t cell activation. Amplification and recruitment of MAC's and T cells. Damage to area where antigen is present. (poison ivy)
Term
cell mediated cytotoxicity type IV
Definition
target antigens recognition of antigen by T cells, activation of T helper and killer cells. destruction of target cells and adjacent tissue
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