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The movement of matter across a cell membrane against a concentration difference is called , and it requires active transport.

What is Active transport?

Active transport refers to the movement of molecules across a cell membrane against the direction of their concentration gradient, that is, from a low concentration to a high concentration. Typically, active transport is linked to the accumulation of significant amounts of substances that the cell requires, such as ions, glucose, and amino acids.

The process is referred to as main active transport if it requires chemical energy, such as that from adenosine triphosphate (ATP). Utilizing an electrochemical gradient is a secondary active transport method. In contrast to passive transport, which does not consume cellular energy, active transport uses cellular energy. One activity for which cells need energy is active transport.

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