how does temperature affect the permeability of the plasma membranes

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grace10101
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how does it affect the proteins which then make the membrane more permeable?
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macpatgh-Sheldon
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V good Q young lady! [assuming you are not a gay guy who prefers to use a girl's username!]

TBH I have not considered this b4, so pls bear with me but I will need to conjecture/hypothesize.

My first thought would be that the unit membrane is said to be "fluid-mosaic", which immediately tells us that the glycoproteins and the proteins [at least the non-integral ones] can move about a little; I would extend this well-established interpretation of the nomenclature and say that this flexibility would allow permeability, in conjunction with the fact that the phospholipid bilayer will be more fluid [almost melts] at a higher temp [as lipids in general do cos of relatively low melting point], thus permitting substances to pass through it more easily.

I could be completely wrong tho - :sorry:

M
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Learningjunky123
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(Original post by grace10101)
how does it affect the proteins which then make the membrane more permeable?
Hi Grace, hope you're well.
In high temperature the cell membrane becomes more fluid. This gives a bigger chance for some materials to get in or out through the spaces made between the phospholipid molecules as a result of this increased fluidity. There are likely other issues arising from temperature, but this is a good one.
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