-
resistance
abbility to ward off disease
-
susceptibility
lack of resistance
-
nonspecific resistance
body defenses that ward off disease without respet to an organism
-
specific resistance
attack specific type of organism associated with immune system
-
physical host difenses
- intact skin
- tears and blinking protect eyes
- saliva washs teeth and gums
- mucous traps microorganisms
- urnine and vaginal secretions keep organisms out of genitournary tract
-
chemical host defenses
- sebum: unsaturated fats inhibit microorganisms
- perpiration- high salt washs bacteria
- lysozymes digest cell walls
- acid prevents bacterial growth in stomach
-
phagocytosis
- ingestion of microorganisms or particles by a cell
- accomplished by wbc
-
blood components
- plasma-water ions and protiens
- rbc
- wbc
- platlets
-
monocytes
fixed or wandering
-
fixed phagocytes
located in spleen
-
granulocytes
eary infection
-
monocytes
present in later infection
-
phagocytes activated
by bacterial componets or chemical messengers
-
inflammation
- a bodily response to cell damage
- redness, pain, heat, swelling, loss of function
-
fever
- high body temp (over 100)
- produced in response to infection
-
fever induced by
- endotoxins, interleukin1 and LPS toxins
- chill- rising body temp
- sweating- falling body temp
-
comlement system
- a system of protiens that inactivate cells
- ex interferons
-
interferons
group of 8-25 serum portiens that activate each other to destroy cells
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