Cell Micrographs

Skill:

•  Interpretation of electron micrographs to identify organelles and deduce the function of specialised cells

    
A micrograph is a photo or digital image taken through a microscope to show a magnified image of a specimen

While organelles have identifying structures, specific shapes may vary depending on the location of cross-sections


Prokaryotic Cell Features


   Feature:        none        nucleoid        cell wall        pili        flagella        all


Eukaryotic Cell Features


   Shoes Chukka Element Sperry Caramel Men's Suede Feature:        none        nucleus        ER        mitochondria        Caramel Element Men's Sperry Suede Shoes Chukka golgi        chloroplast        cell wall        vacuole        all


Organelles  (click on image to display false colour)


Attempts can be made to deduce cell function based on the relative abundance of various organelles:

  • Mitochondria – Cells with many mitochondria typically undertake energy-consuming processes (e.g. neurons, muscle cells)
  • ER – Cells with extensive ER networks undertake secretory activities (e.g. plasma cells, exocrine gland cells)
  • Lysosomes – Cells rich in lysosomes tend to undertake digestive processes (e.g. phagocytes)
  • Chloroplasts – Cells with chloroplasts undergo photosynthesis (e.g. plant leaf tissue but not root tissue)


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