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Campbell Biology Ch 7 Study Guide

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Subject: 
Biology
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Tags: 
Biology
Membrane biology
Cell membrane
Osmosis
Semipermeable membrane
Lipid bilayer
Membrane transport
Membrane protein
Carrier protein
Facilitated diffusion
Biological membrane
Active transport
health

CHAPTER 7 MEMBRANE STUCTURE AND FUNCTION Membrane Structure Explain the meaning of the statement that phospholipids and most other membrane constituents are amphipathic molecules. It means that they have both a hydrophilic region and a hydrophobic region. Explain how the fluid mosaic model of a membrane is structured and the evidence that supports the model. The membrane is a fluid structure with a mosaic of various proteins embedded in or attached to a double layer of phospholipids. Using freeze-fracture to study cells under an electron microscope has shown a pattern that appears to agree with the fluid mosaic model. Describe the fluidity of the components of a cell membrane and explain how membrane fluidity is influenced by temperature and membrane composition.

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