Lecture13 - Lecture 13- Cytoskeleton The cytoskeleton is an...

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Lecture 13- Cytoskeleton The  cytoskeleton  is an intricate network of protein filaments that extends throughout the cytoplasm  allows cells to organize components in their interior  (especially important during cell division)  dynamic: can take on a variety of shapes  coordinated movements Cytoskeleton of Specialized Cells :   sperm : flagella  (microtubules) propel the cell   respiratory epithelia cilia  (microtubules) move mucus   intestinal epithelia microvilli  (actin) increase surface area for absorption   outer hair cells (ear) stereocilia  (actin) sense/tune sound   muscle  ( : (myosin and actin) large-scale motion   red bloodcell I. Anatomy of Cytoskeleton: Built of three types of protein filaments: A. Intermediate Filaments  great tensile strength  toughest and most durable  form a network throughout the cytoplasm and within the nucleus ( nuclear lamina ) 1) Structure:  central rod with globular regions at either end  pairs of  monomers  (one strand)    dimer  two dimers    staggered tetramer  tetramer pack together end-to-end
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Lecture13 - Lecture 13- Cytoskeleton The cytoskeleton is an...

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