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cold blood ,warm blood and unsaturated fatty acids

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cold blood ,warm blood and unsaturated fatty acids

Postby wonderkid » Wed Aug 09, 2006 3:32 am

Cell of poikilothermic (cold blooded) animals usaully have higher proportion of unsaturated fatty acids than homoiothermic (warm blooded)animals.

WHY???????????
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Postby canalon » Wed Aug 09, 2006 3:39 am

Think about the difference between oil and butter...
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Postby wonderkid » Thu Aug 10, 2006 2:31 pm

sorry.i dont understasnd
can u explain more detail?
thanks............
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Postby canalon » Thu Aug 10, 2006 3:20 pm

Look up the content of saturated and unstaurated fats in Butter (or margarine) and oil and reflect on how they look when you put them on your kitchen counter or in your fridge.
And now try to think in terms of what if the membrane was made of butter or of oil when the temperature change...
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Re: cold blood ,warm blood and unsaturated fatty acids

Postby sdekivit » Thu Aug 10, 2006 9:34 pm

wonderkid wrote:Cell of poikilothermic (cold blooded) animals usaully have higher proportion of unsaturated fatty acids than homoiothermic (warm blooded)animals.

WHY???????????


the cell membrane needs to be fluid. For cold blooded animals the temperature is dependent on the surroundings so they could have low body temperatures, especially at nights.

--> properties of fatty acids is that short, unsaturated fatty acids have a low melting point so are fluid at low temperatures so that cell membrane can function normally under low temperatures.
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