6 A Panoramic View of Eukaryotic Cells An idealized animal cellCentrioleRibosomesLysosomeNot in mostplant cellsFlagellumCytoskeletonPlasmamembraneMitochondrionNucleusRoughendoplasmicreticulum (ER)Smoothendoplasmicreticulum (ER)GolgiapparatusFigure 4.6A
7 An idealized plant cell Not in animal cellsCytoskeletonMitochondrionCentralvacuoleNucleusCell wallRough endoplamsic reticulum (ER)ChloroplastRibosomesPlasmamembraneSmoothendoplasmicreticulum (ER)PlasmodesmataGolgi apparatusFigure 4.6B
8 MEMBRANE STRUCTURE AND FUNCTION The plasma membrane separates the living cell from its nonliving surroundings
9 A Fluid Mosaic of Lipids and Proteins The membranes of cells are composed ofLipidsProteins
10 The lipids belong to a special category called phospholipids Phospholipids form a two-layered membrane, the phospholipid bilayerOutside cellHydrophilicheadHydrophobictailCytoplasm(inside cell)(a) Phospholipid bilayer of membraneFigure 4.7A
11 Most membranes have specific proteins embedded in the phospholipid bilayer Hydrophilicregion ofproteinPhospholipidbilayerHydrophobicregion of protein(b) Fluid mosaic model of membraneFigure 4.7B
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