ANATOMY

Detailed explanation-1: -During active transport, substances move against the concentration gradient, from an area of low concentration to an area of high concentration. This process is “active” because it requires the use of energy (usually in the form of ATP). It is the opposite of passive transport .

Detailed explanation-2: -The movement of a substance against its concentration gradient is referred to as active transport. Active transport needs energy, which is generally supplied in the form of ATP. One of the body processes that involve active transport is the pumping of glucose inside and outside the cell.

Detailed explanation-3: -The particles may move along or against their concentration gradient. The downhill movement of particles is called passive transport (e.g. simple diffusion). Conversely, the uphill movement is referred to as active transport.