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Chapter 4: Cell Membrane Structure and Function

Chapter 4:Cell Membrane Structure and FunctionChapter 4: Membrane Structure and FunctionPlasma Membrane : Thin barrier separating inside of cell(cytoplasm) from outside environmentFunction:1) Isolate cell s contents from outside environment2) Regulate exchange of substances between inside andoutside of cell 3) Communicate with other cellsNote: Membranes also exist within cells forming various compartments where different biochemical processes occurThe Fluid Mosaic Model of Cellular Membranes: Chapter 4: Membrane Structure and FunctionPhospholipid Bilayer: Double layer ofphospholipids Hydrophilic ends form outer border Hydrophobic tails form inner layer Lipid tails of phospholipidsare unsaturated (C = C) Chapter 4: Membrane Structure and FunctionCell Membrane Proteins:1) Transport Proteins: Regulate movement of hydrophilic molecules throughmembraneA) Channel Proteins( Na+channels)B) Carrier Pr

Plasma Membrane: Thin barrier separating inside of cell (cytoplasm) from outside environment Function: 1) Isolate cell’s contents from outside environment 2) Regulate exchange of substances between inside and outside of cell 3) Communicate with other cells Note: Membranes also exist within cells forming various

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