1 In 2006, the city of New Meadows, ID issued 17 building permits. 2  All permits issued were for Single Family Homes. 3  Of those 17 permits, 1 were issued for single family homes and 16 were issued for multi-family homes.
In biological processes the direction an ion will move by diffusion or active transport across membrane is determined by the electrochemical gradient. In mitochondria and chloroplasts, proton gradients are used to generate a chemiosmotic potential that is also known as a proton motive force.
See also: diffusion, solute, solution ... An Ion gradient has potential energy and can be used to power chemical reactions when the ions pass through a channel (red). Concentration gradient is the difference of concentration of a substance between two regions.