BIO206H5 Chapter Notes - Chapter 2: Cytosol, Actin, Systematic Chaos
Document Summary
Site of many chemical rxns that are fundamental to the cell"s existence (e. g. manufacture of proteins) Ribosomes : site of protein synthesis", some are free in the cytosol, while others are attached to the er. Cytoskeleton : network of filaments (made of proteins) criss-crossing the cytoplasm of the eukaryotic cell, helps organize the internal activities of the cell, and underlies its movements and changes of shape. The cytoskeleton is a dynamic jungle of ropes and rods that continually being strung together and taken apart; its filaments can assemble and then disappear in a matter of minutes (due to the constant motion of the cytoplasm) Actin filament": present in all eukaryotic cells (e. g. Animal, plant: occur in esp large numbers inside muscle cells, where they serve as part of the machinery thinnest of the filaments that generates contractile forces thickest filaments (b/c they have the form of minute hollow tubes)
