Copyright ? 2011 Pearson Education, Inc. - 1 - Name_______________________Period___________ Chapter 7: Membrane Structure and Function Concept 7.1 Cellular membranes are fluid mosaics of lipids and proteins 1. Phospholipids are amphipathic. Explain what this means. Amphipathic means that the phospholipid has both a hydrophilic region and a hydrophobic region. 2. In the 1960s, the Davson-Danielli model of membrane structure was widely accepted. Describe this model and then cite two lines of evidence that were inconsistent with it. The Davson-Danielli model of membrane structure suggested that the membrane might be coated on both sides with hydrophilic proteins, with a phospholipid bilayer between two layers of proteins.