Primary Active Transport
Active transport is the movement of all types of molecules across a cell membrane against its concentration gradient (from low to high concentration). 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 (ATP), 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.
Other articles related to "active, primary active transport, transport":
... Also active was the 73rd Bombardment Wing, Very Heavy, transferred from Third Air Force ... Introduced into active service in 1951, the B-47 was the first jet aircraft employed by SAC ... became a reality in 1954 with the introduction of the KC-97 Stratotanker into active service ...
... ATP hydrolysis is used to transport hydrogen ions against the electrochemical gradient (from low to high hydrogen ion concentration) ... a conformational (shape) change that drives the hydrogen ions to transport against the electrochemical gradient ...
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