However, Singer and Nicholson further postulated that the lipids form a viscous two-dimensional solvent in which proteins are integrated more or less deeply.
Like the Davson-Danielli model it replaced, it supposes that phospholipids form a bilayer with their hydrophilic ends pointing outwards.  However, Singer and Nicholson further postulated that the lipids form a viscous two-dimensional solvent in which proteins are integrated more or less deeply. For ten points, what two-word phrase describes this model of a cell membrane?
Like the Davson-Danielli model it replaced, it supposes that phospholipids form a bilayer with their hydrophilic ends pointing outwards.  
fluid mosaic model