Movement of a substance across a cell membrane against its concentration gradient. Process associated with accumulation of molecules that the cell needs, such as ions, glucose and amino acids. This type of transport requires energy in the form of ATP.

ACTIVITY: "Activity in cell associated with the transport of molecules against their concentration gradient is called active transport. "

Link to This Definition

Did you find this definition of ACTIVITY helpful? You can share it by copying the code below and adding it to your blog or web page.
Edited and fact checked by Pam: Google +