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In the cell membrane, hydrophilic heads orient to the inside and outside of the membrane, with the hydrophobic molecules inside. This gives the membrane its semi permeable fluid nature.he hydrophilic region in the cell is water-loving and it  attracts the water molecules. It is basically composed of polar  groups which readily dissolve and absorb water.
Answers: The cell membrane is composed of a phospholipid bilayer. Facing both the extra and cytoplasmic sides of the cell are the hydrophilic heads. The hydrophobic tails of the phospholipids are clustered inside. Various proteins, sterols (e.g. cholesterol), lipids and carbohydrates are embedded in the plasma membrane.Some are peripheral, and are only one side of the membrane. Others are transmembrane. The cell membrane has various functions: Provides a semipermeable barrier for the cell from the outside world.nswers: The cell membrane is composed of a phospholipid bilayer. Facing both the extra and cytoplasmic sides of the cell are the hydrophilic heads. The hydrophobic tails of the phospholipids are clustered inside. Various proteins, sterols (e.g. cholesterol), lipids and carbohydrates are embedded in the plasma membrane.