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...
Active Transport Bulk Movement Enriched Biology 1-2 Active vs. Passive Transport Passive Transport Active Transport No energy required Energy (ATP) required High to Low concentration Low to High concentration No proteins required, except during facilitated diffusion Protein pumps required Active Transport ...
A uniport is a membrane protein that transports a single ion or molecule in a single direction. This type of transport can be compared to the admission gate at a stadium; it allows a one-way move, either entering or leaving the stadium. It is used whenever a single substance needs to ...
Active transport is defined as a process in which substances move across a biological membrane against a concentration gradient, relying on the cell's metabolic energy. This process involves carriers that bind to the substance to be transported and facilitate its movement across the membrane. ...
Active transport is the movement of molecules against their concentration gradient. It requires a transmembrane protein. Since this process decreases...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your to...
Active Transport 1. Active Transport- the movement of substances across cell membranes from low to high concentrations‚ requiring energy and proteins that act as carriers 2. Adenosine triphosphate- chemical compound consiting of one molecule of adenine‚ one of ribose‚ and three of phosphoric...
Active transport is the same as passive transport only without the use of a transport protein. Transport Proteins: Substances are moved into or out of a cell through a variety of different mechanisms. Some substances pass directly through the cell membrane...
Secondary active transport: where one substrate moves down its concentration gradient while the other moves against the concentration gradient. Two types of transporters are employed: symporter (left), when the directions of movement of two substrates are the same, and antiporter (right) when the mo...
FacilitatedDiffusionandActiveTransport FacilitatedDiffusion FacilitatedDiffusionMovementofspecificmoleculesacrosscellmembranesthroughproteinchannels Eachproteinchannelonlyallowsaparticularsubstancestocross.Theproteinfacilitates(helps)thediffusionacrossthemembrane FacilitatedDiffusionandEnergy Occurswiththefollowing:1....
FacilitatedDiffusionandActiveTransport FacilitatedDiffusion FacilitatedDiffusionMovementofspecificmoleculesacrosscellmembranesthroughproteinchannels Eachproteinchannelonlyallowsaparticularsubstancestocross.Theproteinfacilitates(helps)thediffusionacrossthemembrane FacilitatedDiffusionandEnergy Occurswiththefollowing:1....