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15 Cards in this Set
- Front
- Back
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How do light microscopes work
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Light passes through specimen, then magnified by lens
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How does an electron microscope work?
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Focus beam of electrons through/on surface
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SEM
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Scanning Electron Microscope
Study surfaces |
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TEM
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Transmission Electron Microscope
study internal ultrastructure |
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Cell fractionation
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separates organelles in a mixture through spinning
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Describe staining used in light & electron microscopy
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Light = dyes
Electron = heavy metal atoms |
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Drawback of electron microscopy
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Cells killed
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Structure of intestinal cells
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Microvilli, thin projectiles, increase SA b/c need to exchange lots of material w/ surroundings
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Nuclear envelope
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doub mem around nucleus, perforated
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Nucleolus
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Make ribosomes
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Chromatin
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DNA & prot
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Peroxisome
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Produce by-product hydrogen peroxide, converts to H20
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Centrosome
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Where microtubules are initiated, contains centrioles
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Flagellum
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m/o cluster of microtubules
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What is a plastid? What are the 3 types of plastids?
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Plant organelle
amyloplast, chromoplast, chloroplast |
