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Ch
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that is much diff
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types of channel
proteins in their membranes, each featuring a structure that allows it to admit a
particular type of ion or small molecule
⁃ these are responsible for facilitated diffusion
⁃ facilitated diffusion: the passive transport of substance that would’t otherwise
cross the membrane
⁃ potassium channels only allow potassium to go through a cell membrane (diff
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Facilitated Diffusion:
⁃ diffusion: passes straight through membrane
wants equilibrium b/t cells, so they move cells across cell membrane
once equilibrium is met it just stops
⁃ facilitated: needs a protein
can be a pump, transporter, or channel
⁃