Membranes - polar ( hydrophilic ), enabling it to interact...

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Membranes Plasma Membrane The plasma membrane surrounds the cell and functions as an interface between the living interior of the cell and the nonliving exterior. All cells have one. It regulates the movement of molecules into and out of the cell. Membrane Structure The fluid-mosaic model states that membranes are phospholipid bilayers with protein molecules embedded in the bilayer. Phospholipids Most of the lipids in a membrane are phospholipids . Phospholipids contain glycerol, two fatty acids, and a phosphate group. The phosphate group is
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Unformatted text preview: polar ( hydrophilic ), enabling it to interact with water. The fatty acid tails are nonpolar ( hydrophobic ) and do not interact with water. Proteins Embedded in the Membrane Proteins are scattered throughout the membrane. They may be attached to inner surface, embedded in the bilayer, or attached to the outer surface. Hydrophilic (polar) regions of the protein project from the inner or outer surface. Hydrophobic (nonpolar) regions are embedded within the membrane. Membrane proteins are capable of lateral movement....
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This note was uploaded on 11/10/2011 for the course BIOLOGY bi 101 taught by Professor - during the Fall '10 term at Montgomery.

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Membranes - polar ( hydrophilic ), enabling it to interact...

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