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Download Cell Motility - Cochran`s Half Acre
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Transcript
Cell Motility: Cell motility or cell movement (2 types) – Movement of the entire cell by Cilia/Flagella – Structures moving within the cell - Motor Protein Components of the Cytoskeleton: • Microtubules – Tubulin subunits – Cell division and movement • Microfilaments – Actin subunits – Movement and shape http://anatomy.med.unsw.edu.au/teach/phph1004/1998/WWWlect4/img024.jpg Components of the Cytoskeleton: • Intermediate Filaments – Only in animal cells of specific tissues – Mechanically strengthen cells or cell parts and help maintain shape – Six known groups Structural Basis of Cell Motility: • Three Mechanisms – Parallel microtubules slide in opposite directions • Microtubule Movement – Shunting of organelles • Shunting organelles 1 • Shunting organelles 2 – Length of microtubule or microfilaments can change due to rapid assembly and disassembly of subunits making up the tubules or filaments http://www.molbiol.umu.se/forskning/gullberg/Introduction%20to%20Microtubules%20and%20Op18-filer/MTdynamik.jpg
