EXAMS 1 POWERPOINTS Flashcards
three levels of disease prevention
primary (immunization)
secondary (pap smears)
tertiary (antibiotic users)
what is the primary prevention of diseases
removing the risk factor so that the diseas does not occur
what’s the secondary prevention of disease
detecting the disease when you can still cure it
what’s the tertiary prevention of disease
preventing further damage or reducing complications of a disease
when does autocrine signaling occur
occurs when a cell releases a chemical into the intercellular fluid that affects its own activity
what cells does paracrine signaling act on
nearby cells
endocrine signaling relies on?
hormones carried in the bloodstream to cells throughout the body
synaptic signaling occurs in what system?
occurs in the nervous system where neurotransmitters act only on adjacent nerve cells
neurotransmitters acts only on?
adjacent nerve cells
metabolism is normally aerobic or anaerobic
aerobic
what are the byproducts of cellular metabolism
lactic and pyruvic acids
what is cellular metabolism
chemical task of maintaining essential cellular functions
metabolism provides the cell with energy
true
normally, water and electrolyte movement occurs to do what?
to equalize concentrations
with injury, cell membrane becomes what?
becomes more permeable
examples of passive transport
-diffusion
- osmosis
facilitated diffusion
cells adapt to changes in the
- internal environment
cells adapt to increased work demands by changing in??
- size (atrophy and hypertrophy)
- number (hyperplasia)
- form (metaplasia)
what is atrophy
decrease in cell size
what is hypertrophy
increase in cell size
what is metaplasia
replacement of adult cells
what is hyperplasia
increase in the number of cells
what is dysplasia
deranged cell growth of a specific tissue
injuries from physical agents are caused by?
- mechanical forces
- electric forces
- extreme temperatures
radiation injury causes
- ionization radiation
- ultraviolet radiation
- nonionizing radiation
chemical injury drugs
- drugs
- carbon tetrachloride
- lead toxicity
- mercury
injuries from biological agents are caused by
virus
parasite
bacteria
injury from nutritional imbalances causes
excesses and deficiencies
what is reversible cell injury
impairs cell functions but does not result cell death
what are the two patters of revivable cell injury
- cellular swelling
- fatty change
what is cellular swelling of reversible cell injury
impairments of the energy depended on sodium/potassium ATPase membrane pulp. usually as the result of hypoxia cell injury
what is fatty change of reversible cell injury
linked to intracellular accumulation of fat
free radicals having unpaired electron causes them to?
unstable and highly reactive
what are hypoxic cell injury deprives the cell of what?
- deprives cell of oxygen
hypoxic cell injuries interrupts what?
oxidative metabolism and the generation of ATP
the longer a tissue is hypoxic?
the greater chance of irreversible cellular injury
what are some causes hypoxia
- edema
- ischemia
- respiratory disease
- inadequate amount of oxygen in the air
- inability of the cell to use oxygen
apoptosis is equated with what?
suicide
the process of apoptosis (fallen apart) eliminates cells that?
- are worn out
- have been produced in excess
- have developed improperly
- have genetic damage
what is necrosis
refers to cell death in an organ or tissue that is still part of a living person
necrosis often interferes with?
cell replacement and tissue
gangrene occurs when?
mass of tissues undergoes necrosis
what’s the rate of the spread of dry gangrene?
slow
what is the spread of tissue of wet gangrene
the spread of tissue damage is rapid
cardinal signs of inflammation
rubor( redness ) tumor ( swelling ) calor (heat) dolor (pain) functio laesa (loss of function)
factories involved in protective responses
- inflammatory reactions
- immune response
- tissue repair and wound healing
granulomatous inflammation is associated with
foreign bodies and microorganisms
what is the immediate transient response of an inflammation
occurs with a minor injury
what is the immediate sustained response of inflammation
occurs with more serious injury and continues for several days and damages the vessels in the area
what is the delayed hemodynamics response of inflammation
involves an increase in capillary permeability that occurs 4 to 24 hours after injury
what is another name for white blood cells
leukocytes
what are the two types of leukocytes that participate in the acute inflammatory response
granulocutes
monocytes
what’s the largest of the white blood cells
monocytes
what makes up the granulocutes of the white blood cells
neutrophils
eosinophils
basophils
inflammatory mediators
- histamine
- cytokines
- arachidonic acid metabolites
- platelet - activating factor
- plasma proteins
what are the types of inflammatory exudates
- serous exudates
- hemorrhagic exudates
- membranous or pseudomembranous exudates exudates
- purulent or suppurative exudates
- fibrinous exudates
serous exudates are water fluids low in what?
-low in protein content
serous exudates result from plasma entering the?
inflammatory site
when does hemorrhagic exudates occur?
when there’s severe tissue injury that causes damage to the blood vessels or when there’s leakage or red cells from the capillaries
membranous or pseudomembranous exudates develop on what surfaces
- develop on mucous membrane surfaces
membranous or pseudomembranous exudates are composed of necrotic cells enmeshed in a ?
fibropurulent exudate
which of the inflammatory exudates contains pus?
purulent or suppurative exudates
what does fibrinous exudates contain?
large amounts of fibrinogen and form a thick and sticky meshwork
what are purulent or suppurative exudates composed of?
degraded white blood cells, proteins and tissue debris
what is the non specific early response to injury?
acute inflammation
what does acute inflammations aim at?
removing the injurious agent and limiting tissue damage
acute inflammations are self-limited whiles chronic inflammations are?
self-perpectuating
proliferation of fibroblasts occurs during acute or chronic inflammation
chronic inflammation
exudate infiltration of neutrophils occurs during acute or chronic inflammations
acute
infiltration by mononuclear cells (macrophages) and lymphocytes occurs during acute or chronic inflammation
chronic inflammation
what is the alterations in white blood cell count called
leukocytes is or leukopenia
what are the stages of wound healing
inflammatory phase
proliferation phase
maturational or remodeling phase
chemical mediators and growth factors mediate the healing processes true or false
true
interactions between the extra cellular and cell matrix helps with healing process true or false
true
types of immune defenses
- innate or nonspecific immunity
- adaptive or specific immunity
- active immunity
- passive immunity
cytokinesis are secreted by what cells
both innate and adaptive cells
what are colony stimulating factors
stimulate the growth and differentiation of bone marrow progrenitors
comments of innate immunity
- epithelial barriers
- phagocytic cells
(neutrophils and macrophages) - NK cells
- Plasma proteins
what is the complement system
- found in the blood and is essential for the activity of antibodies
what does the activation of the complement system does?
increases bacterial aggregation which renders them more susceptible to phagocytosis
what immunity is antigen identification
adaptive/ specific immunity
types of adaptive immune responses
- humoral immunity
- cell mediated immunity or cellular immunity
cell mediated immunity are mediated by what lymphocytes
spermicide T lymphocytes
what type of adaptive immune response defends against intracellular microbes such as viruses
cell mediated immunity or cellular immunity
humoral immunity are mediated by?
mediated by molecules in the blood
what is the principal defense against extra cellular microbes and toxins?
humoral immunity
antigens are substances foreign to the host that can?
stimulate immune response
what recognizes antigens?
antibodies
macrophages and dendritic cells process and present antigen peptides to
CD4+ helper T cells
antigen presentation captures antigen and new ale their recognition by
T cells
Antigen presentation is the initiation of
adaptive immunity
what are the B cells/lymphocytes
humoral immunity
memory
what are t cells/ lymphocytes
cell mediated immunity
memory
memory is both B and T cells. true or false
true
identify factors of B lymphocytes
- presence of membrane immunoglobulin that functions as antigen receptor
B lymphocytes produces what?
immunoglobulin that functions as the antigen receptor
functions of T lymphocytes
- control of intracellular viral infections
- rejection of foreign tissue grafts
- delayed hypersensitivity reactions
what two immunoglobulins activates complement
IgG
IgM
what immunoglobulins are found in secretions
IgA
what immunoglobulin is responsible for protection of newborn
IgG
what immunoglobulin is preeminent in early immune responses
IgM
what immunoglobulin binds to mast cells and basophils
IgE
what immunoglobulins are found on B lymphocytes
IgD
what immunoglobulin is needed for the maturation of B cells
IgD