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Cytoskeleton

Cytoskeleton

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Cytoskeleton

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  1. Cytoskeleton • Just like your body has a skeleton to maintain its shape and size, cells have a cytoskeleton to do the same thing.

  2. Actin Microfilaments: The Thin Fibers • ______________ are a polymer of a protein called __________. • They’re used for cell movement and muscle contraction

  3. ___________are larger strands and are thicker and stronger. • Microtubules are hollow tubes made of a protein called ________.

  4. Centrioles Organize Cell’s Internal Space • The centrioles are the cell part from which the _______________of the cytoskeleton grow. • The position of the centrioles determines the location of the nucleus, cell shape, and the location of flagella and cilia in Eukaryotic cells that have these. • NOT found in: prokaryotes, most plants, fungi. • Eukaryotic cell types have a tubulin network attached to different protein structures MTOC, usually around the nucleus) • Prokaryotes use different cytoskeletal proteins

  5. Cell Part: Centrosome & Centrioles • FUNCTION: The centrioles (2 per centrosome) are responsible for coordinating the ____________________________during cell division AND organizing the cytoskeleton.

  6. Centriole Structure: Interesting Bio-geometry (9-triplet microtubules)

  7. Structures For Movement • Some cells move using organelles called cilia and flagella • Cilia: • Flagella: • Pseudopodia:

  8. One More Way to Move: Pseudopodia • Means “false foot” • Think blob

  9. How do cells move? • Cilia: many tiny beating “hairs.” • Flagella: a few long, whip-like propellers. • Pseudopodia: flow from 1 spot to another by reorganizing the cytoskeleton. • Do The Dance….

  10. Movement in Animals • What body systems work together to make you move? • How is that similar to the cell systems we just learned about?