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Dictionary » F » Facilitated diffusion Facilitated diffusionDefinition noun Transport of substances across a biological membrane from an area of higher concentration to an area of lower concentration by means of a carrier molecule. Since the substances move along the direction of their concentration gradients, energy is not required.
For example, polar molecules and charged ions dissolved in water can not diffuse freely across cell membrane due to its hydrophobic lipids. They can only be transported across membranes by proteins forming transmembrane channels. Larger molecules are transported by transmembrane carrier proteins, such as permeases that change their conformation as the molecules are carried through, for example glucose or amino acids.
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Results from our forumPorous potatoes - Osmosis... Potatoes are not made exclusivety of water of course. Solutes moves via facilitated diffusion through chanels oriented by gradient of concentration.
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Re: Porous potatoes - Osmosis... but is there any salt in the potatoe? if so does it move in or out via diffusion or facilitated diffusion? thanks!
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Facilitated Diffuion questionwell, what kind of molecules do you have in mind? Generally, the term facilitated diffusion is specifically reserved for hydrophilic channels, but there are other types of protein-assisted ...
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Facilitated Diffuion question... of a study effort to prepare for a big upcoming test. Question: Does Facilitated diffusion require a hydrophilic channel?????????? If so, then how are large hydrophobic (meaning ...
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