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| Protein filament, formed from a chain of globular actin molecule. A major constituent of the cytoskeleton of all eucaryotic cells and especially abundant in muscle cells |
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| Specialized layer of cytoplasm on the inner face of the plasma membrane. In animal cells it is an actin-rich layer responsible for cell-surface movements |
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| Short cylindrical array of microtubules, usually found in pairs at the center of a centrosome in animal cells. Also found at the base of cilia and flagella (called basal bodies) |
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| Centrally located organelle of animal cells that is primary microtubule-organizing center and separates to form the two spindle poles during mitosis. In most animal cells it contains a pair of centrioles |
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| Hairlike extension on the surface of a cell with a core bundle of microtubules and capable of performing repeated beating movements. Drive the movement of fluid over epithelial sheers, as in the lungs. |
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| system of protein filaments in the cytoplasm of a eucaryotic cell that gives the cell shape and the capacity for directed movement. Its most abundant components are actin filaments, microtubules, an intermediate filaments |
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| The property shown by microtubules of growing and shrinking repeatedly through the addition and loss of tubulin sub-units from their exposed ends. |
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| Member of a family of large motor proteins that undergo ATP-dependent movement along microtubules. Responsible for the bending of cilia. |
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| Long thin actin containing extension on the surface of an animal cell. Sometimes has an exploratory function, as in a growth cone. |
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| Long whip like protrusion that drives a cell through a fluid medium by its beating |
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| Fibrous protein filament that forms ropelike networks in animal cells. Often used as a structural element that resists tension applied to the cell from outside |
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| a large family of motor proteins that use the energy of ATP hydrolysis to move along microtubule |
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| Dynamic sheetlike extension on the surface of an animal cell, especially one migrating over a surface. |
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| Long stiff cylindrical structure composed of the protein tubulin. |
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| Protein such as mysoin or kinesin that uses energy derived from ATP hydrolysis to propel itself along a protein filament or polymeric molecule |
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| Long highly organized bundle of actin, myosin and other proteins in the cytoplams of muscle cells that contracts by a sliding filament mechanism. |
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| Type of motor protein that uses ATP to drive movements along actin filaments. |
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| Fibrous layer on the inner surface of the inner nuclear membrane formed as a network of intermediate filaments. |
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| Refers to a structure such as an actin filament or a fertilized egg that has an inherent asymmetry so that one end can be distinguished from the other. |
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| Family of small GTPases involved in signaling that causes a rearrangement of the actin cytoskeleton. |
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| Repeating unit of a myofibril in a muscle cell, composed of an array of overlapping thick (myosin) and thin (actin) filaments. |
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| Protein from which microtubules are made |
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