transport of a substance (as a protein or drug) across a cell membrane against the concentration gradient; requires an expenditure of energy
Active transport is the movement of all types of molecules across a cell membrane against its concentration gradient. In all cells, this is usually concerned with accumulating high concentrations of molecules that the cell needs, such as ions, glucose and amino acids. If the process uses chemical energy, such as from adenosine triphosphate, it is termed primary active transport. Secondary active transport involves the use of an electrochemical gradient. Active transport uses cellular energy, unlike passive transport, which does not use cellular energy. Active transport is a good example of a process for which cells require energy. Examples of active transport include the uptake of glucose in the intestines in humans and the uptake of mineral ions into root hair cells of plants.
The numerical value of active transport in Chaldean Numerology is: 2
The numerical value of active transport in Pythagorean Numerology is: 3
Images & Illustrations of active transport
Translations for active transport
From our Multilingual Translation Dictionary
- transporte activoSpanish
Get even more translations for active transport »
Find a translation for the active transport definition in other languages:
Select another language:
Discuss these active transport definitions with the community:
Word of the Day
Would you like us to send you a FREE new word definition delivered to your inbox daily?
Use the citation below to add this definition to your bibliography:
"active transport." Definitions.net. STANDS4 LLC, 2017. Web. 29 Jun 2017. <http://www.definitions.net/definition/active transport>.