last minute stuff Flashcards
what makes the blood nerve barrier
perineurium
what nerve sheath has an exterminal lamina, blood vessels, and reticular fibers
endoneurium
how can you identify muscular arteries from elastic arteeries
muscular arteries have elastin in their intimas and adventitias whereas elastic arteries have elastin in their media
what are varicose veins the result of
leaky valves in the veins
what are tonofilaments
intermediate filaments (cytokeratins) that desmosomes and hemidesmosomes are attached to
what kind of secretion does the pancreas exhibit
merocrine
what are stereocilia
long microvilli
what are microvilli composed of
actin
what is impetigo
the result of a toxin from staph infection that damages desmosomes
what is pemphigus
autoimmunity against desmosomes (collagen 17)
dystrophic epidermolysis bullosa involves
defective collagen type 7
junctional epidermolysis bullosa involves
defective laminin 5
what is the zonula adherins composed of
cadherins (Ca++ dependent)
what is the zonula occludens composed of
occludens and claudins
what is the macula adherens and what is its function and composition
desmosomes (spot welds), desmoglein and desmocolin, and it functions to link keratin intermediate filaments between cells
