Determine the positions of membrane enclosed

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Determine the positions of membrane-enclosed organellesDirect intracellular transport Form the mitotic spindle that segregates chromosomes during cell division
Microtubules Emanate from the Centrosome in Animal Cells
Intermediate FilamentsProvide mechanical strengthNuclear laminaPresent in cytoplasmCell junction
Review: Functions of the Cytoskeleton12Dynamic processes (undergo rapid changes):Cell motilityPhagocytosisCell divisionCell contraction Intracellular transportStatic processes (undergo very slow changes):Epithelium tissueNeuronal networksNuclear envelopeCytoskeleton is dynamic and adaptableContractile ring: ActinMitotic spindle: Microtubule
Cytoskeleton and Cell PolarityIn cells that have achieved a stable, differentiated morphology—such as mature neurons or epithelial cells—the dynamic elements of the cytoskeleton provide stable, large-scale structures for cellular organization.Actin: forms microvilli that increase surface area of cells and stabilize tight junctionsMicrotubules: form “transport” tracks from one end to the other in epithelial cellsIntermediate filaments:stabilize cell Junctions called desmosomes
Cytoskeleton Can Undergo Dynamic and Rapid Changes : PhagocytosisHow this dynamic feature of the cytoskeleton is generated and maintained?
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