A concentration gradient in the electrolyte is illustrated. ·If the electrolyte is unstirred, the gradiant causes H-ion diffusion to the surface, where they capture electrons (reduction) to become ...

Diffusion Substances move from a high ... gradient Water No Active transport Substances move against a concentration gradient Mineral ions into plant roots, glucose from the gut into intestinal ...

To transport an ion against its concentration gradient requires energy, which in the biological membrane is supplied by metabolic or chemical reactions. By the Curie–Prigogine principle of non ...

The presence of a Dpp gradient ... its strongest concentration (visualized as the brightest green fluorescence) down the center of the imaginal disc. The posterior and anterior diffusion of ...