The plasma membrane consists of a phospholipid bilayer with hydrophobic tails and hydrophilic heads. Cholesterol in the membrane aids in its fluidity.
The plasma membrane is composed mainly of phospholipids arranged in a phospholipid bilayer, with hydrophobic tails on the interior and hydrophilic heads facing outwards. It also contains cholesterol that contributes to its fluidity, not impermeability to water-soluble substances.
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