Navigation Links
Facilitated diffusion


Facilitated diffusion (facilitated transport) is a process of passive transport (diffusion) via which molecules diffuse across membranes, with the help of transport proteins (mediated transport).

Small uncharged molecules can easily diffuse across cell membranes. However, due to the hydrophobic nature of the lipids that make up cell membranes, water-soluble molecules and ions cannot do so; instead, they are helped across by transport proteins. The transport protein involved is intrinsic, that is, it completely spans the membrane. It also has a binding site for the specific molecule (e.g., glucose) or ion to be transported. After binding the molecule, the protein changes shape and carries the molecule across the membrane, where it is released. The protein then returns to its original shape, to wait for more molecules to transport.

In contrast to active transport, facilitated diffusion does not require energy and carries molecules or ions down a concentration gradient.


'"/>


(Date:8/26/2020)... ... August 25, 2020 , ... ... in partnership with Essex Bio-Technology, a bio-pharmaceutical company specializing in Ophthalmology and ... study of SkQ1 ophthalmic solution in patients with moderate to severe Dry ...
(Date:8/23/2020)... ... August 21, 2020 , ... ... has been published and is now available on the company’s global website. ... the X-ray analysis community, presenting current news and crystallographic research. , The ...
(Date:8/21/2020)... ... August 19, 2020 , ... The ... uniting life science, data science, informatics and IT leaders goes VIRTUAL and announces ... of uncertainty and change, Bio-IT takes the leadership role of keeping our life ...
Breaking Biology News(10 mins):
Other biology definition