uestion 3, You and your cytoskeleton You remember the cytoskeleton and its compo
ID: 150458 • Letter: U
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uestion 3, You and your cytoskeleton You remember the cytoskeleton and its component protein fibers that Dr. Modney described o Microtubules: about 25 nanometer (nm) diameter Microfiliaments: about 7 nanometer (nm) diameter Intermediate filaments: about 10 nanometer (nm) in diameter If we again take the longest dimension of the 201 lab to represent the 25 micrometer length of one of your intestine cells, what would be the diameter of these components of the cytoskeleton? Could you see them? Would any of them be as thick as a humarn hair at this scale? A garden hose ? A telephone pole? oExplanation / Answer
If the cell dimension of 25um will be represented by the dimension of the lab then the also the dimension of the cytoskeletal components( microtubules, intermediate filaments) can reach a maximum size of few nm only. Out of these only microtubules can attain a maximum thickness 2.5um in certain cases .Thus the length of microtubules defines the upper limit of cell size. Cell cannot grow beyond that limit.
25um to 5000mM or 5000*103um(size of room)
Even increasing the cell size to that does not lead tomuch increase in the size of cytoskeletal components. Microtubules being the largest of all ,can attain a maximum size of 6mm seen in salamander egg.
Human hair thickness ranges from 17-180uM, they can reach that much thickness of 1.8uM only.
If cells attain that large size then, aymmetry arises due to destabiling of centrosome.
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