Final answer:
Active transport is the movement of a substance from an area of low concentration to an area of high concentration using ATP. It is a process that requires energy and is the opposite of passive transport.
Step-by-step explanation:
The movement of a substance from an area of low concentration to an area of high concentration using energy obtained from ATP is called active transport. Active transport is a process that requires energy, specifically ATP, and is used to move substances against their concentration gradient. It is the opposite of passive transport, which does not require energy and moves substances from an area of high concentration to an area of low concentration.
The movement of a substance from an area of low concentration to an area of high concentration using energy obtained from ATP is known as active transport. This process requires energy because the substance is moving against its concentration gradient, which is the opposite of what occurs in passive modes of transport like passive diffusion and osmosis. Proteins embedded in the cell membrane, often referred to as pumps, use ATP to move substances across the membrane in the process of active transport.