active transport n. The movement of a chemical substance through a gradient of concentration or electrical potential in the direction opposite to normal diffusion, requiring the expenditure of energy:active transport across a cell membrane. American Heritage® Dictionary of the English Language, Fifth...
A reappraisal of recently proposed definitions and criteria of active transport in terms of experimentally accessible parameters leads to the conclusion that it is in principle impossible to give a...doi:10.1007/BF02477976Oleg JardetzkyDepartment of Pharmacology, Harvard Medical School, USA...
Definition and Significance of Active Transport Active transport is the movement of ions or molecules against their concentration gradient, which involves the input of chemical energy. This transport is carried out by integral membrane proteins, which are essential for the movement of substances in a ...
“Active transport.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/active%20transport. Accessed 8 Feb. 2025. Copy Citation Share Post the Definition of active transport to Facebook Facebook Share the Definition of active transport on Twitter Twitter...
On the definition of active transport 来自 掌桥科研 喜欢 0 阅读量: 15 作者: O Jardetzky 摘要: A reappraisal of recently proposed definitions and criteria of active transport in terms of experimentally accessible parameters leads to the conclusion that it is in principle impossible to give a....
Because of this, active transport uses chemical energy (e.g. ATP) to move such substances against their concentration gradient. The common sites of active transport are root hair cells and the wall of the small intestine (villi). Active Transport Definition Active transport is a kind of ...
The meaning of TRANSPORT is to transfer or convey from one place to another. How to use transport in a sentence. Synonym Discussion of Transport.
Passive transport is the transport of substances across the plasma membrane from an area of high concentration to an area of low concentration. The movement is, therefore, along or in the same direction as the concentration gradient. Conversely, active transport is a type of cellular transport ...
1.The act of transporting; conveyance. 2.The condition of being transported by emotion; joy or rapture. 3.A ship or aircraft used to transport troops or military equipment. 4.A vehicle, such as an aircraft, used to transport passengers, mail, or freight. ...
Active transportation facilitiesmeansfacilities providedfor thesafety andmobility ofactive transportationusers, including, butnot limitedto, trails, sidewalks, bike lanes, shared-use paths,and other facilitiesinthe publicright-of-way. Sample 1Sample 2Sample 3 ...