Final answer:
The membrane lipids in the cell membrane form a bilayer of phospholipids and contribute to the fluidity of the membrane. The lipid and protein components of the membrane can move laterally within the membrane, making it a dynamic structure.
Step-by-step explanation:
The membrane lipids in the cell membrane are arranged in a bilayer of phospholipids, with their hydrophobic fatty acid tails in contact with each other. The membrane is not a static structure, but rather a dynamic and fluid mosaic model. The lipids and proteins in the membrane can move laterally within the membrane, contributing to its fluidity and flexibility.