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edithwm edithwm
wrote...
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12 years ago
Diffusion of a substance across the cell membrane is influenced by all of the following, except
   
   hydrolysis of ATP.
   the charge on the ion.
   concentration gradient.
   lipid solubility.
   the presence of the membrane channels
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wrote...
On Hiatus
12 years ago
Diffusion and facilitated diffusion are both passive transport mechanisms for molecules to cross cell membranes.  Energy is not required. 

So, I believe the answer is ASmiling Face with Open Mouth 
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