Which of the active transport types employs diffusion? Medications
Tue Nov 05 2002 13:30:00 GMT-0500 (Eastern Standard Time) · In cellular biology active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration—against the concentration gradient. Active transport requires cellular energy to achieve this movement. There are two types of active transport : primary active transport that uses adenosine triphosphate () and secondary active ...
If the process uses chemical energy such as adenosine triphosphate (ATP) it is called primary active transport. Secondary active transport involves the use of an electrochemical gradient and does not use energy produced in the cell. Unlike channel proteins which only transport substances through membranes passively carrier proteins can transport ions and molecules either passively through facilitated …
Exocytosis - Wikipedia
Facilitated diffusion - Wikipedia
Facilitated diffusion - Wikipedia
Facilitated diffusion (also known as facilitated transport or passive-mediated transport ) is the process of spontaneous passive transport (as opposed to active transport ) of molecules or ions across a biological membrane via specific transmembrane integral proteins. Being passive facilitated transport does not directly require chemical energy from ATP hydrolysis in the transport step itself ...
Tubular secretion occurs at Proximal Convoluted Tubule (PCT) and Distal Convoluted Tubule (DCT); for example at proximal convoluted tubule potassium is secreted by means of sodium-potassium pump hydrogen ion is secreted by means of active transport and co-transport i.e. antiporter and ammonia diffuses into renal tubule.
Exocytosis is a form of active transport and bulk transport in which a cell transports molecules out of the cell by secreting them through an energy-dependent process. Exocytosis and its counterpart endocytosis are used by all cells because most chemical substances important to them are large polar molecules that cannot p...
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