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Chapter 5: Membrane Structure and Function
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Chapter 5: 
Membrane Structure and 
Function 
 
The Basics 
● The structure of cell membranes results in selective permeability 
● Cell membranes separate the internal environment of the cell from the external 
environment. 
● Selective permeability is a direct consequence of membrane structure as 
described in the fluid mosaic model. 
Fluid Mosaic Model 
1. Singer and Nicolson 
(1972) introduced this 
model 
2. Embedded proteins are 
scattered throughout 
membrane in an irregular ...