Problem: Explain how organisms are able to maintain a relatively constant membrane fluidity when faced with extremes in temperatures.

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Cell membrane can maintain its fluidity regardless of the its exposure to extreme temperatures through the help of cholesterol. At high temperature, phospholipids move apart to each other causing too much fluidity, but with cholesterol’s help, the phospholipids attach to cholesterol and pulling each other closer together preventing it from becoming overly fluid. 

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Explain how organisms are able to maintain a relatively constant membrane fluidity when faced with extremes in temperatures.