Can You Explain The Cytoskeleton Functions And Structure?


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In most cells the microtubules intermediate filaments and microfilaments from the flexible cellular framework called the cytoskeleton (cells Skeleton). This latest framework extends through out the cytoplasm connecting the various organelles and cellular components. Microtubules are hollow slender cylindrical structure in animal cells. Each microtubule is made of spiraling subunits of globular proteins called tubulin subunits. Microtubule function in the movement of organelles such as secretary vesicles and in chromosome movement during division of cell nucleus. They are also part of a transport system with in the cell e.g., in nerve cells they help move materials through the long nerve processes.

Microtubule is important part of cytoskeleton in the cytoplasm and they are involved in the overall shape changes that cells undergo during period of specialization.

Intermediate filaments are chemically heterogeneous group of protein fibers, the specific proteins of which can vary with cell type. These filaments help to maintain cell shape and the special organization of organelle as well as promote mechanical activities with in the cytoplasm.

Microfilaments are solid strings of proteins (actin) molecules. Actin microfilaments are most highly developed in muscles cells as myofibrils, which help muscle cells to shorten or contract. Actin microfilaments in non-muscles cells provide mechanical support for various cellular structures and help form contractile system responsible for some cellular movements. E.g., amoeboid movement in some protozoa.

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