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netlike array of proein filaments
maintains shape of nucleus |
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can see from 1mm to 100nm
visible light is passed through the specimen and then through glass lenses |
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a measure of the clarity of the image
resolving power of the human eye is limited |
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Definition
focuses a beam of electrons through the specimen or onto its surface
from 100um to .1nm |
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Term
transmission electron microscope
scanning electron microscope |
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Definition
two types of electron microscopes
TEM uses electromagnets as lenses to focus and magnify the image by bending the paths of electrons
SEM is useful for detailed stufy of the surface of a specimen |
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| the study of cell structure |
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| is to take cells apart, separating the major organelles so that their functions can be studied |
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| powerful machines that spin test tubes at 130,000 rpm |
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| all cells are bounded by this |
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| is in all cells and is semifluid substance |
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