(1)Structure and Support (2)Intracellular Transport 3Contractility and Motility 4Spatial Organization 结构与支持 胞内运输 收缩与运动 空间组织化 Actin filaments (1) Actin filaments (2)∠ (3) Motor protein Intermediate Microtubule filament Intermediate filaments Nerve cell (b) 2) Motor protein Actin filaments Microtubule (4④ （2） Microtubule Motor protein 3 (Q)Epithelial cell ( Dividing cell Copvright 1999 John Wiley and Sons.Inc.All rights reserved 细胞骨架功能The three types of protein 细胞骨架功能 结构与支持 胞内运输 收缩与运动 空间组织化