defences

Cards (7)

what are a humans defences against pathogens
skin
tears
HCl in the stomach
scabs
eyelashes
nose/trachea
sebacious filaments
how does skin act as a defence
layer of dead skin cells accumulate acting as a physical barrier
how does stomach acid act as a defence
low pH means more H+ ions which interact with bonds in the tertiary structure
why do tears act as a defence
contain lysosomes and antibodies
hydrolitic enzymes
why are scabs considered defences
platelets cause blood clotting
platelets are insoluble proteins called fibrin
how does the nose/trachea act as a defence
cilliated epitheleal cells waft mucus which is secreted by the globlet cells
mucous membrane
how do sebacious filaments act as a defence
by creating a barrier on the skin