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cytoskeleton
| Question | Answer |
|---|---|
| what is the cytoskeleton? | interlinking network of filaments within the cell that supports its structure and function |
| microfilaments | thinnest filaments of the cell that are made from actin proteins assembled in an ATP dependent process |
| function of microfilaments | provides structural support, muscle contraction, cell motility, and cell shape (microvilli) |
| motor protein (microfilaments) | interacts with the motor protein myosin |
| intermediate filaments | cable like structures that provide structural support for the cell, holds organelles in place, are not dynamic, and are made of a variety of proteins such as keratin and lamin |
| microtubules | the largest filaments; they are hollow tubes built from repeating units of tubulin assembled in a GTP dependent process |
| function of microtubules | aid the movement of vesicles, organelles, and chromosomes throughout the cell; for the inner framework of cilia and flagella |
| motor proteins (microtubules) | interacts with the motor proteins kinesin and dynein |
| centrosomes | microtubule-organizing center of the cell consisting of a pair of centrioles each compossed of nine triplets of microtubules |