Unit 7: Cell Membrane Structure
The structure of biological membranes makes them fluid and dynamic.
Phospholipids form bilayers in water due to the amphipathic properties of phospholipid molecules
Drawing of the fluid mosaic model
Membrane proteins are diverse in terms of structure, position in the membranes and function (include glycoproteins)
Cholesterol is a component of animal cell membranes
Cholesterol in mammalian membranes reduces membrane fluidity and permeability to some solutes
Analysis of evidence from electron microscopy that led to the proposal of the Davidson-Danielli model
Using models as representations of the real world-there are alternative models of membrane structures (NOS 1.11)
Falsification of theories with one theory being superseded by another-evidence falsified the Davison-Danielli model
Analysis of the falsification of the Davson-Danielli model that led to the Singer-Nicolson model.