How is a cell membrane formed? The hydrophobic fatty acid chains points outward toward the watery environment, while the hydrophilic heads point inward creating a phospholipid bilayer.

The hydrophobic fatty acid chains points inward toward each other, while the hydrophilic heads point out creating a phospholipid bilayer.

The hydrophilic fatty acid chains points inward toward each other, while the hydrophobic heads point out creating a phospholipid bilayer.

A single layer of hydrophobic fatty acid chains alternate with a single layer of hydrophilic heads creating a membrane.