<P> Facilitated diffusion is different from free diffusion in several ways . First , the transport relies on molecular binding between the cargo and the membrane - embedded channel or carrier protein . Second , the rate of facilitated diffusion is saturable with respect to the concentration difference between the two phases ; unlike free diffusion which is linear in the concentration difference . Third , the temperature dependence of facilitated transport is substantially different due to the presence of an activated binding event , as compared to free diffusion where the dependence on temperature is mild . </P>
<P> Facilitated diffusion is different from free diffusion in several ways . First , the transport relies on molecular binding between the cargo and the membrane - embedded channel or carrier protein . Second , the rate of facilitated diffusion is saturable with respect to the concentration difference between the two phases ; unlike free diffusion which is linear in the concentration difference . Third , the temperature dependence of facilitated transport is substantially different due to the presence of an activated binding event , as compared to free diffusion where the dependence on temperature is mild . </P>
where are protein molecules and ion channels embedded
where are protein molecules and ion channels embedded
membrane
membrane