Advertisement
Advertisement
active transport
[ ak-tiv trans-pawrt ]
noun
- the movement of ions or molecules across a cellular membrane from a lower to a higher concentration, requiring the consumption of energy.
active transport
noun
- biochem physiol a process by which molecules are enabled to pass across a membrane from a region in which they are in a low concentration to one of high concentration; this requires the expenditure of energy in metabolism and is assisted by carrier proteins, commonly referred to as pumps
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 requires the assistance of a type of protein called a carrier protein, using energy supplied by ATP.
Discover More
Word History and Origins
Origin of active transport1
First recorded in 1960–65
Discover More
Example Sentences
Each inactive tape transport requires two amperes and the one active transport requires 10 amperes.
From Project Gutenberg
Advertisement
Word of the Day
[pet-ri-kawr]
Meaning and examplesStart each day with the Word of the Day in your inbox!
By clicking "Sign Up", you are accepting Dictionary.com Terms & Conditions and Privacy Policies.
Advertisement
Advertisement
Advertisement
Browse