e-tutor.com - Online tutoring, learning, and homeschooling resources      Home    Enroll    Tour    Contact Us    Graphing Calculator         Dictionary Home    Index    About   
 
     
 

Definition of 'active transport'

Noun

  1. transport of a substance (as a protein or drug) across a cell membrane against the concentration gradient; requires an expenditure of energy


Get this dictionary without ads as part of the e-Tutor Virtual Learning Program.