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Intermediate filament

Cytoskelaton

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Cell biology
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Cytoskeleton
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Intermediate filament
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Microfilament

3/22/16 Cytoskeleton - a system of protein filaments that extend through cytosol The cytoskeleton helps support the large volume of cytosol inside a cell Most prominent in eukaryotic cells However, unlike our static skeleton, the cytoskeleton is dynamic Cytoskeletal filaments are made of noncovalently-linked subunits *allows for rapid assembly and disassembly* Filaments can disassemble and reassemble in different locations in cell Cytoskeleton Functions maintains cell SHAPE & RIGIDITY A framework connecting the plasma membrane to the organelles CELLULAR MOVEMENT MOTILITY: whole cell i.e. amoeba or sperm ? cilia/flagella intracellular structures - chromosomes, vesicles CONTRACTILITY - movement involving contraction of a cell muscle - tissue, cleavage furrow.

Unit 1 Biology Review

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An Overview of Eucaryotic Cell Structure Eucaryotic cells have membrane-delimited nuclei In addition to the nucleus, eucaryotic cells have other membrane-bound organelles that perform specific functions within the cells; this allows simultaneous independent control The large membrane surface area of eucaryotic cells allows greater respiratory and photosynthetic activity The Cytoplasmic Matrix, Microfilaments, Intermediate Filaments, and Microtubules The cytoplasmic matrix, although superficially featureless, provides the complex environment required for many cellular activities Microfilaments (4 to 7 nm) may be scattered throughout the matrix or organized into networks and parallel arrays; they play a major role in cell motion and cell shape changes
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