What is active transport?

Active transport is the movement of molecules across a cell membrane from an area of lower concentration to an area of higher concentration, requiring energy input from the cell. This process is carried out by specific proteins embedded in the cell membrane called transport proteins. Active transport allows cells to maintain internal concentrations of molecules that are different from their external environment, and is essential for various cellular functions such as nutrient uptake, waste removal, and maintaining cell volume.

Active transport is a process by which molecules are transported across a cell membrane from an area of lower concentration to an area of higher concentration. This process requires energy, which is usually in the form of ATP. Active transport is used to transport a variety of molecules, including ions, sugars, and amino acids.