1. The plasma membrane is composed primarily of phospholipids Other components include embedded protein, carbohydrates and Cholesterol.
2. Each phospholipid consists of:
A. A polar head that is Hydrophilic or “water loving”.
B. Two non-polar hydrocarbon tails that are hydrophobic or “water fearing”.
3. The phospholipids arrange themselves into a phospholipids and sterols (or two layers).