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The cell membrane is composed of different kinds of molecules. The phospholipid chains surround the cell and is what the cell membrane is primarily made of. Around the cell, you can also find proteins embedded on or all the way through the cell. This protein helps large molecules from outside the cell or inside the cell to go in or out. Between the phospholipid is also cholesterol which helps the cell membrane fluidity.

This all being said, there are three things that make up the cell membrane:

# The phospholipid bilayer

# The protein inside and outside the cell # cholesterol between some phospholipid chains.

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16y ago

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