E2-Immune System-Horners Syndrome Flashcards
what is an innate cell
non specific from birth
monocytes, neutrophils, basophils, mast cells, natural killer cells
what are adaptive cells
acquire following exposure
remember foreign invaders
B and T cells/lymphocytes
what are macrophages and dendritic cells
innate and adaptive cells
where do stem cells occur and what do they generate
bone marrow
immune cells
what are neutrophils
predominantly leukocyte or WBC
1st cells to arrive
phagocytosis
what are monocytes and macrophages
long lived
monocytes mature into macrophages
filter pus/bacteria from neutrophils and kill larger pathogens
what are eosinophils
next cells to participate
handle larger invading pathogens
what do eosinophils release
histamine- vasodilator to improve circulation
what are B lymphocytes
produce antibodies in reaction to antigens or foreign bodies
what are T lymphocytes
stimulate B lymphocytes that are directly kill infected host cells
what are presenting antigens
they present antigens to T lymphocytes to ingest/digest pathogens
what are natural killer cells
large lymphocytes
directly kill cells infected by pathogens
activate macrophages
what is our first line of defense
innate cells
resolve most threats
external/internal defenses
what are our external defenses
physical, chemical, and mechanical barriers that limit host penetration
skin, mucus, coughing, sneezing, stomach acid, etc
what are our internal defenses
soluble factors- modify cell behavior and enhance inflammatory response
innate cells and components from birth
what is our 2nd line of defense
inflammatory response
vascular response and plasma protein systems
what is the vascular response
activated at time of injury or exposure
series of vascular and cellular activities
possibly start a fever
natural killer cells
what is the plasma protein systems
clotting to control bleeding
kinin
what is kinin
produces vasodilation and vascular permeability
makes debris/pathogen vulnerable to phagocytosis
what is the 3rd line of defense
adaptive immunity
what is adaptive immunity
acquired and reactive
characterized by specificity and memory of a pathogen- B/T cells
days to weeks to respond
develops throughout life
responds with exposure
what is active immunity
concept of most vaccinations using a harmless virus to produce a secondary immune response with antibodies and memories
what is passive immunity
passing of antibodies through birth/breast feeding but is only temporary due to lack of memory cells
what is cell mediated immunity
not involving antibodies but instead cells like WBCs and B and T cells that can kill antigens