U3KA5 Flashcards
What do non-specific body defenses act for?
to prevent all pathogens from entering the body and or attack all pathogens if detected in the body.
What is an example of physical defeces?
epithelial cells line the skin and internal digestive and lung surfaces, they form a physical barrier between outside surfaces and the blood.
What are examples of chemical body defences?
mucus, tears, stomach acid and saliva are produced which trap and kill pathogens.
What is an inflammatory response?
if an injury occurs, the inflammatory response is triggered to limit the entry of pathogens into the blood, isolate and kill them
_____ cells detect injury and release histamine.
mast cells
histamine causes ______ in nearby arteries and ______ permeability of the capillaries.
vasodilation, increased.
How do phagocytes destroy pathogens?
through phagocytosis
What happens in phagocytosis?
the phagocyte engulfs the pathogen and they are destroyed by a digestive enzyme contained in lysosoms.
Phagocytes release ____ which attract more phagocytes to the site of infection.
cytokines.
