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| A photograph taken through a microscope. |
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| What does our understanding of nature often parallel? |
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| Microscopes were first used in the _______________ century. |
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| _______________ is the type of microscope that works by passing visible light through a specimen, such as a microorganism or a thin slice of animal or plant tissue. |
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| How does a light microscope make an image |
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| ________________ is the increase in the apparent size of an object. |
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| What does LM 1,000x next to figure 4.1B tell you about the micrograph? |
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| What would happen to the image of the Euglena in figure 4.1B if it were magnified further? |
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| _______________ is a measure of the clarity of an image. |
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| _______________ is the ability of an optical instrument to show two close objects as separate. |
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| The human eye cannot resolve details finer than _______________ mm. |
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| Light microscopes can be used to view objects as small as the smallest _______________. |
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| _______________ is the man who discovered cells. |
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| What had scientists seen with their crude microscopes up through the middle of the 20th century? |
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| _______________ states that all living organisms are composed of cells and that all cells come from preexisting cells. |
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| _______________ is the type of microscope invented in the 1950's. |
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| _______________ is the microscope which uses a beam of electrons to make an image. |
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| Why are electron microscopes superior to light microscopes? |
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| How much magnification do electron microscopes have? |
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| _______________ is the type of electron microscope used to study the detailed 3-D architecture of cell surfaces . |
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| How does an SEM capture an image? |
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| _______________ is the type of electron microscope used to study the details of internal cell structure. |
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| How are specimens prepared for viewing under a TEM? |
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Definition
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| How does a TEM capture an image? |
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| Electron microscopes use _______________ as lenses |
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| Why are TEM and SEM black and white micrographs often artificially colored? |
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| Why is it impossible to view living specimens with an electron microscope? |
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| _______________ is the optical technique which amplifies differences in density while allowing living cells to be examined. |
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| How is fluorescence and confocal microscopy of cells done? |
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| _______________ are the smallest cells. |
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| _______________ are the bulkiest cells. |
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| _______________ are the longest human cells. |
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| Plant and animal cells are usually _______________ (this much) bigger than bacterial cells |
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| What are logistics that determine a cell's minimum size? |
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| What are the logistics which determine a cell's maximum size? |
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| What advantage is there for large cells? |
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| what is the drawback to being a large cell? |
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