Chap 14: Immune System Flashcards
the ability to resist damage from foreign substances
Immunity
defense against any pathogen
Innate immunity
first line of defense
physical barriers
types of immunity
- innate
- adaptive
promote inflmmation by causin vasolidation
histamine
are chemicals that can kill microbes and prevent their entry into cells
chemical mediators
found in tears and saliva to kill bacteria
lysozyme
prevent entry of microbes
mucous membranes
produced in red bone marrow and lymphatic tissues fight foreign susbtances
WBC
ingest and destroy foreign substances
Phagocytic cells
proteins that protect agains viral infections by stimulating surrounding cells to produce antiviral proteins
chemical mediators
leave blood and enter infected tissues and can release histamine
basophils
first to respond to infection but die quickly
neutrophils
release chemicals to reduce inflammation
eosinophils
protect lymph in lymph nodes and blood in spleen and liver
Marcophages