Answer:
hydrophobic tails
Explanation:
All cell membranes are made up of phospholipids. As the name “bilayer” suggests the lipid bilayer is made up of two layers of lipid. Lipid is amphiphilic. Lipid molecules have a polar or hydrophilic phosphate head group and a non-polar or hydrophobic tail that consists of fatty acid chains. The hydrophilic phosphate head group is exposed to the surface of the lipid bilayer and the hydrophobic tails are oriented towards the middle of the lipid bilayer.
