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7_3 and 7_4

biology test

passive transport -movement of materials across membrane -no energy -high to low concentration
exocytosis -materials exiting/leaving cell
pinocytosis -forms tiny pockets -pinch off to form vacuole
phagocytosis -extensions of cytoplasm surrounding particles -cell engulfs
phagocytosis & pinocytosis -two examples of endocytosis
endocytosis -materials entering the cell
bulk transport -larger molecules -transported across cell mebrane
calcium, sodium, potassium -proteins move ________,________,and________ across the cell membrane
endocytosis & exocytosis -examples of active transport
transport proteins -active transport of small molecules across cell membrane -"protein pumps"
active transport -movement of materials across cell membrane using energy -requires energy -low to high concentration
selective permeability -picky -allows some substances to cross while others cant
hypotonic solution on cell -water goes in so the cell begins to burst
hypertonic solution on cell -water goes out the cell causing it to shrink
isotonic solutions on cell -water goes in and out making it equal
osmotic pressure -force exerted by movement of water in and out of cell
hypotonic -solutions are below strength
hypertonic -solutions are above strength
isotonic -solutions are the same strength
osmsis -example of facilitated diffusion
osmosis -movement of water across membrane by facilitated diffusion
aquaporins -water channel protein
protein channels -carriers that allow molecules to pass easily
facilitated diffusion -use protein channels to allow particles to cross cell membrane
no -diffusion requires ________ additional energy
equilibrium -substances on both sides of membrane are the same
diffusion -movement of particles from high to low conentration
examples of passive transport -diffusion & facilitated diffusion
constant/stable -cell membrane keeps internal conditions________
Created by: lexiegrace123