Roles of Active Transport

Active transport is a biological process that allows cells to move ions or molecules against their concentration gradient, which means they move from an area of lower concentration to an area of higher concentration. This process requires the expenditure of energy, usually in the form of adenosine triphosphate (ATP), to drive molecular or ionic movement across a cell membrane or a cellular structure.

Roles of Active Transport

I. Reabsorption of glucose / some salts in the kidney / by kidney tubules;
II. Absorption of digested food from alimentary canal;
III. Reabsorption of useful material in the blood stream;
IV. Sodium pump mechanism in the nervous system of the nerve cell;