5. Some regions of the plasma membrane, called lipid rafts, have a higher concentration of cholesterol molecules. At higher temperatures, these regions_________.
(A) are more fluid than the surrounding membrane
(B) detach from the plasma membrane and clog arteries
(C) are less fluid than the surrounding membrane
(D) have higher rates of lateral diffusion of lipids and proteins into and out of these regions
(E) dissolve into the whole plasma membrane

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