Membrane Interior

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LunarStrain
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Membrane Interior

Post by LunarStrain » Mon Oct 22, 2007 2:14 am

Is there fluid (water) within the hydrophobic interior?

Im having a little trouble understanding my text book. :?

If the tails of the phospholipids are hydrophobic then there should be water within the chains. But then I read that the phospholipid bilayer is fluid. Why? Im not sure but is it because of the kinks formed by the unsaturated fatty acid tails, they cause a break in the close alignment of the hydrophobic interior, does this allow a small amount of water in?
Does temperature have an effect on the alignment of the fatty acids, causing an increase or decrease in fluidity?

If someone could help me out with this...

Thanks

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mith
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Post by mith » Mon Oct 22, 2007 3:31 am

If it's hydrophobic, there should not be water! Look at the definition of hydrophobic. Fluid means its in a liquid state, it has nothing to do with water. By definition a liquid is a state where molecules can slide over each other(think sand).
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MrMistery
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Post by MrMistery » Mon Oct 22, 2007 5:52 am

Is sand a liquid? i don't think so.
Incidentaly, yes, a higher temperature causes fluidity of the membrane to increase.
My advice to you is try to read those inctroductory chapters noody reads that reveal the chemistry necessary in order to understand cellular biology
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mith
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Post by mith » Mon Oct 22, 2007 4:09 pm

Sand is not a liquid but I think molecularly you can imagine it like that. Let me put it this way, sand flows and can take shape of its container.
Last edited by mith on Tue Oct 23, 2007 7:10 am, edited 1 time in total.
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LunarStrain
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Post by LunarStrain » Tue Oct 23, 2007 6:54 am

Oh I see, lol :oops: that was kind of a stupid question
sand isn't water, why would it be water

sorry but thanks

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