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what is ultrafiltration
fluid filtering from blood into bowmans capsule at high pressure.
Why is fluid filteree?
efferent arteriole has narrower lumen creating high pressure in glomerulus.
hydrostatic pressure forces fluid out.
what is filtered into bowmans capsule
small molecules such as glucose/ions.
NO PROTEINS: too big.
fenestrations
pores that allow fluid to pass into bowmans capsule.
basement membrane
made of collagen + glycoproteins.
act as a filter - large molecules stay in glomerulus.
podocytes
capsule cell walls - shape helps create a gap between capsule cells and endothelium of kidney