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Why can molecules that are fat-soluble permeate across a cell membrane?

April 26, 2017cell membrane fat-soluble molecules permeate

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Why can molecules that are fat-soluble permeate across a cell membrane?

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Cell membranes are composed of a lipid bilayer. Cellular fluid (cytosol) and the cell’s organelles are contained by the cell’s membrane, which is composed of a lipid bilayer. Lipids are a type of fat. Because a cell’s membrane is composed of fat, only fat-soluble molecules are able to dissolve through the membrane into the cytosol.