Definition For Active Transport

However the cell often needs to transport materials against their concentration gradient.

Definition for active transport. Active transport requires the assistance of a type of protein called a carrier protein using energy supplied by atp. Atp to move such substances against their concentration gradient. Ion s glucose and amino acid s are transported across a biological membrane towards the region that already contains a lot of such substances. In these cases active transport is required.

Because of this active transport uses chemical energy e g. It requires the expenditure of energy. In some cases the movement of substances can be accomplished by passive transport which uses no energy. Active transport is a type of cellular transport in which substances e g.

Active transport the movement of ions or molecules across a cell membrane in the direction opposite that of diffusion that is from an area of lower concentration to one of higher concentration. Active transport transport of a substance as a protein or drug across a cell membrane against the concentration gradient. Active transport is the process of transferring substances into out of and between cells using energy.