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Question
facilitated diffusion is a process that occurs in plant and animal cells. as the name presumes, facilitated diffusion is a form of diffusion, but slightly different.
if a desired molecule is too large or charged, instead of it moving through a cells membrane, protein channels, which are embedded into a cells membrane, escort the molecules inside of the cell.
there are hundreds of different protein channels for different molecules.
remember, during diffusion the movement is still from a high concentration to a lower concentration and therefore requires no energy being depleted from the cell.
which of these scenarios is similar to the process of facilitated diffusion?
going to jail
being locked out of your house
being escorted into a building
Facilitated diffusion involves protein channels or carriers to help molecules move across the cell membrane. The scenario "being escorted into a building" is similar because in facilitated diffusion, protein channels (like escorts) help molecules (like people) move across the membrane (like into a building). The other scenarios ("being locked out of your house" and "going to jail") do not involve a similar concept of assistance (like protein channels/carriers) for movement across a barrier.
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being escorted into a building