- secondary active transport
- active transport in which the movement of a second substance is coupled to the movement of a substance undergoing primary active transport, as in cotransport and countertransport
Medical dictionary. 2011.
secondary active transport
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Secondary active transport — In secondary active transport, in contrast to primary active transport, there is no direct coupling of ATP; instead, the electrochemical potential difference created by pumping ions out of the cell is used. [GeorgiaPhysiology|7/7ch05/7ch05p12]… … Wikipedia
Active transport — This article is about transport in cellular biology. For human transport systems, see active transportation. The action of the sodium potassium pump is an example of primary active transport. Active transport is the movement of a substance… … Wikipedia
active transport — Often defined as transport up an electrochemical gradient. More precisely defined as unidirectional or vectorial transport produced within a membrane bound protein complex by coupling an energy yielding process to a tranport process. In primary… … Dictionary of molecular biology
active transport — n movement of a chemical substance by the expenditure of energy against a gradient in concentration or electrical potential across a plasma membrane * * * (in biochemistry) an energy dependent process in which certain substances (including ions,… … Medical dictionary
transport — transportable, adj. transportability, n. transportive, adj. v. /trans pawrt , pohrt /; n. /trans pawrt, pohrt/, v.t. 1. to carry, move, or convey from one place to another. 2. to carry away by strong emotion; enrapture. 3. to send into banishment … Universalium
Membrane transport — In cellular biology the term membrane transport refers to the collection of mechanisms that regulate the passage of solutes such as ions and small molecules through biological membranes namely lipid bilayers that contain proteins embedded in them … Wikipedia
Passive transport — means moving biochemicals and other atomic or molecular substances across membranes. Unlike active transport, this process does not involve chemical energy, because, unlike in an active transport, the transport across membrane is always coupled… … Wikipedia
Sodium-glucose transport proteins — solute carrier family 5 (sodium/glucose cotransporter), member 1 Identifiers Symbol SLC5A1 Alt. symbols SGLT1 Entrez … Wikipedia
Co-transport — Co transport, also known as coupled transport or secondary active transport, refers to the simultaneous or sequential passive transfer of molecules or ions across biological membranes in a fixed ratio. Permitting one ion or molecule to move from… … Wikipedia
co-transport — In membrane transport describes tight coupling of the transport of one species (generally Na+) to another (eg. a sugar or amino acid). The transport of Na+ from high to low concentration can provide the energy for transport of the second species… … Dictionary of molecular biology
