Active transport: Definition Active transport is a

Active Transport Definition Active transport is a kind of cellular transport where substances move against a concentration gradient. This means that the direction is from an area of lower concentration to an area of higher concentration. Hence, this process will require the expenditure of energy, and the assistance of membrane proteins, such as carrier proteins. Learn the difference between active and passive transport and get examples of each type of transport process in the cell. Active transport is a cellular process that uses energy mainly in the form of ATP, to move molecules or ions against their concentration gradients. It includes primary active transport , which directly uses energy for transport , and secondary active transport , which utilizes an electrochemical gradient to move other substances. Active transport is an energy-driven process where membrane proteins transport molecules across cells, mainly classified as primary or secondary, based on how energy is coupled to fuel these mechanisms. The former constitutes the means by which a chemical reaction, e.g., ATP hydrolysis, powers the direct transport of molecules to establish specific concentration gradients, as seen with sodium/potassium-ATPase and hydrogen-ATPase pumps. The latter employs those established gradients to ...