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The cytoskeleton is a network of fibers that organizes structures and…
The cytoskeleton is a network of fibers that organizes structures and activities in the cell (6.6) :black_flag:
Roles of the Cytoskeleton: Support, Motility,
and Regulation :check:
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The most obvious function of the cytoskeleton is to give mechanical support to the cell and maintain its shape. This is especially important for animal cells,whih lack walls.
The cytoskeleton is also involved in regulating biochemical
activities in the cell in response to mechanical stimulation.
The cytoskeleton is more dynamic than an animal skeleton, however. It can be quickly dismantled in one part of the cell and reassembled in a new location, changing the shape of the cell.
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Microtubules : :recycle:
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All eukaryotic cells have microtubules, hollow rods measuring about 25 nm in diameter and from 200 nm to 25 11m in length. The wall of the hollow tube is constructed from a globular protein called tubulin. Each tubulin protein is a dimer, a molecule madeup of two subunits.
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Centrosomes and Centrioles (In animal cells), microtubules grow out from a centrosome, a region that is often located near the nucleus and is considered a microtubule-organizing center.' These microtubules function as compression-resisting girders of the cytoskeleton.
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Cilia and Flagella (In eukaryotes), a specialized arrangement of microtubules is responsible for the beating of flagella and cilia, microtubulecontaining extensions that project from some cells
Microfilaments (Actin Filaments) Microfilaments are solid rods about 7 nm in diameter. They are also called actin filaments because they are built from molecules of actin, a globular protein. A microfilament is a twisted double chain ofactin subunits
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