this post was submitted on 12 May 2024
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Isn't it just water carrying stuff across a concentration gradient?
Gravity is just stuff falling, but thereβs complexity there, as well.
No? Water can't carry anything across the membrane.
Oh. Then how does the stuff get across the membrane? Does the membrane allow stuff to move over a concentration gradient without the water?
Water can move freely across the membrane, but the stuff that's dissolved in the water cannot move across the membrane.