Linked from
The 17 pages that link to Concentration gradient, each with the reason it gives.
OsmosisRelated: A solute gradient can correspond to a water-potential gradient across the membrane.
Mass transferRelated: It is the common approximation for the driving force in diffusion models.
Active transportRelated: Moving against this difference requires an energy source.
Pressure gradientCompared with: It can drive diffusion even when pressure is uniform.
Molecular diffusionRelated: Diffusion flux points down this spatial change in concentration.
Diffusion equationRelated: Diffusive flux points down this gradient in Fick's first law.
Facilitated diffusionRelated: Neutral solutes diffuse in the direction set by this gradient.