Microscopes are Used to Study Cells Units of Structure and Function

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Microscopes are Used to Study CellsUnits of
Structure and Function
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Microscopes Tools to Study Cells

• Light Microscope- light passes through a specimen
  and then through magnifying lenses.
• a. Magnification- ratio of an objects image to
  its real size.
• b. light microscopes can magnify up to 1,000
  times the actual size of the specimen.

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Types of Light Microscopy
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ElectronMicroscope

• Focus electron beams through or onto the specinen
• Capable of very high magnification
• Capable of 2nm. Resolution

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Two Types of Electron Microscopes

• Scanning Electron Microscope
• SEM
• Used to view 3D images called scanning electron
  micrographs

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SEM Micrograph

• Scanning electron microscope picture of an
  insulin containing beta cell tagged, using an
  antibody, to its cell surface and a second
  antibody congugated to dynabeads

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TEM

• Transmission Electron microscope TEM
• Used to see through a specimen
• Micrographs are called transmission electron
  micrographs

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Mitochodria

• Transmission Electron Micrograph of a Mitochondria