Biology

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  • Created by: Ellie2244
  • Created on: 17-11-19 11:44
what are the two types of microscopes?
light microscope + electron microscope
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what can light microscopes do?
magnify objects several hundred times
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what can electron microscopes do?
magnify objects several hundred thousand times
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on a microscope what do you look through?
the eyepiece lens
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what do you hold it by?
the handle
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what are the 3 settings for the objective lens?
times 4, times 10, times 40
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what do you hold down the slide with?
clips on the stage
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you control how much light comes in through the?
iris diaphragm
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the ----- source helps you to see whats on the slide
light
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electron microscope....
shorter wavelength + higher resolution
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what does resolution mean?
ability to distinguish between to points that are close together + the higher resolution the more detail you can observe
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what does TEM stand for?
transmission electron microscope
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what does SEM stand for?
scanning electron microscope
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why do we place the onion epidermis onto the slide with forceps?
because if it folds no light can pass through
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specialized cells....
have a particular job called differentiation
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when a cell becomes specialized....
it changes structure to suit its function
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cell that are not specialized are known as....
stem cells
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what are the levels of organisation in a multi-cellular organism?
cells->tissues->organs->organ system->organism
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Other cards in this set

Card 2

Front

what can light microscopes do?

Back

magnify objects several hundred times

Card 3

Front

what can electron microscopes do?

Back

Preview of the front of card 3

Card 4

Front

on a microscope what do you look through?

Back

Preview of the front of card 4

Card 5

Front

what do you hold it by?

Back

Preview of the front of card 5
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