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1. Diffusion is the net movement of molecu … 1. Diffusion is the net movement of molecules or atoms from a region of high concentration (or high chemical potential) to a region of low concentration (or low chemical potential). This is also referred to as the movement of a substance down a concentration gradient.a substance down a concentration gradient.
, 2. The passive movement of molecules or particles along a concentration gradient, or from regions of higher to regions of lower concentration.
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