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Transport Proteins - Physiology (view source)
Revision as of 13:50, 15 August 2008
, 13:50, 15 August 2008→Facilitated Diffusion
==Facilitated Diffusion==
==Facilitated Diffusion==
[[Image:facildiftri.jpg|right|thumb|200px|<small><center>Schematic of a Transport Protein</center></small>]]
[[Image:facildiftri.jpg|right|thumb|200px|<small><center>Schematic of Facilitated Diffusion</center></small>]]
Transport proteins allow hydrophillic molecules, which are too large to get through water filled protein channels, to passively cross the membrane. The molecules bind to protein and then the protein changes shape depositing the molecule at the other side of the membrane. This transport method is also known as '''Facilitated Diffusion'''. As with diffusion it occurs from areas of high concentration to those of low so is a '''passive''' process.
Transport proteins allow hydrophillic molecules, which are too large to get through water filled protein channels, to passively cross the membrane. The molecules bind to protein and then the protein changes shape depositing the molecule at the other side of the membrane. This transport method is also known as '''Facilitated Diffusion'''. As with diffusion it occurs from areas of high concentration to those of low so is a '''passive''' process.