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Tour of the Cell 3

Tour of the Cell 3. Cells gotta work to live!. What jobs do cells have to do? make proteins proteins control every cell function make energy for daily life for growth make more cells growth repair renewal. Making New Cells. Cytoskeleton. Function structural support

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Tour of the Cell 3

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  1. Tour of the Cell 3

  2. Cells gotta work to live! • What jobs do cells have to do? • make proteins • proteins control everycell function • make energy • for daily life • for growth • make more cells • growth • repair • renewal

  3. Making New Cells

  4. Cytoskeleton • Function • structural support • maintains shape of cell • provides anchorage for organelles • protein fibers • microfilaments, intermediate filaments, microtubules • motility • cell locomotion • cilia, flagella, etc. • regulation • organizes structures & activities of cell

  5. Direction of organism’s movement LE 6-23b Direction of active stroke Direction of recovery stroke Motion of cilia 15 µm

  6. Outer microtubule doublet Plasma membrane 0.1 µm Dynein arms Central microtubule LE 6-24 Cross-linking proteins inside outer doublets Microtubules Plasma membrane Radial spoke Basal body 0.5 µm 0.1 µm Triplet Cross section of basal body Activity: Cilia & Flagella

  7. Microtubule doublets ATP LE 6-25a Dynein arm Dynein “walking”

  8. Cytoskeleton • actin • microtubule • nuclei

  9. Centrioles • Cell division • in animal cells, pair of centriolesorganize microtubules • spindle fibers • guide chromosomes in mitosis

  10. Any Questions??

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