cell shape and mobility the cytoskeleton n.
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Cell Shape and Mobility the Cytoskeleton - PowerPoint PPT Presentation


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Cell Shape and Mobility the Cytoskeleton. Cytoskeleton. Defines cell’s shape Facilitates shape changes Enables cell movement Directs organelle movement. The Three Main Subunits. Microtubules. Structure Protein subunits Function Maintains cell shape

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Presentation Transcript
cytoskeleton
Cytoskeleton
  • Defines cell’s shape
  • Facilitates shape changes
  • Enables cell movement
  • Directs organelle movement
microtubules
Microtubules
  • Structure
    • Protein subunits
  • Function
    • Maintains cell shape
    • Moves chromosomes during cell division
    • Moves cells about– flagella and cilia
microfilaments
Microfilaments
  • Composition
    • Actin – protein double strand
  • Function
    • Maintain Shape
    • Motion - pseudopodia / cytoplasmic streaming
    • Contraction – cleavage furrow / muscle
microfilaments motion
Microfilaments - motion
  • Motion - pseudopodia / cytoplasmic streaming
microfilaments contraction
Microfilaments - contraction

Cytokinesis muscle contraction

intermediate filaments
Intermediate Filaments
  • Composition
    • Keratins – a family of proteins
  • Function
    • Reinforce cell shape