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What process occurs when molecules diffuse freely across cellular membranes without expending energy?

April 26, 2017cellular Diffuse energy expending freely Membranes molecules occurs process

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What process occurs when molecules diffuse freely across cellular membranes without expending energy?

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Much of the traffic across cell membranes occurs by diffusion. A passive process which does not require the cell to expend energy. Solute molecules can reduce the proportion of water molecules that can freely diffuse.