Cells 1.1.1

Cells 1.1.1

Microscopy
1. Light Microscope
  1. Resolution
    1. 200nm
  2. Magnification
    1. x1500
  3. Staining
    1. Possible
      Annotations:
      - Not if specimen is alive
    2. simple colour stain
    3. specimen alive
  4. Inexpesive
2. Resolution
  1. 'The degree to which it is possible to distinguish between two objects very close together' (Higher resolution = Greater detail)
3. Magnification
  1. 'The degree to which a size of an image is larger than the object itself'
    1. Magnification= image size/object size
4. Electron microscopes
  1. Transmission Electron Microscope (TEM)
    1. Resolution
      1. 0.2nm
    2. Magnification
      1. x500 000
    3. Staining
      1. Fixed/stained
      2. Specimen dead
  2. Scanning Electron Microscope (SEM)
    1. Resolution
      1. 0.2nm
    2. Magnification
      1. x100 000 + 3D Images
    3. Staining
      1. Metal coated
        Reflect electrons
      2. Specimen dead
  3. Expensive
~Be able to recognise and describe drawing and photographs of cell structures...This takes practise!!~
Organelles
1. Nucleus
  1. Largest organelle
  2. Contains Chromatin
    1. Consists of DNA and proteins
      1. Instructions for making proteins
  3. Surrounded by double membrane nuclear envelope
    1. with nuclear pores
  4. Nucleolus
    1. very dense
    2. Makes RNA and ribosomes
2. Endoplasmic recticulum (ER)
  1. Rough
    1. Covered in Ribosomes
  2. Smooth
    1. Lipid processing
  3. Flattened membrane sac
3. Golgi Apparatus
  1. Receives proteins from ER
  2. Modifies proteins
    1. Packaged into Vesicles
      1. Transported to cell surface to be secreted.
  3. Also releases lysosomes
4. Mitochondria
  1. Aerobic Respiration
  2. inner membrane folds in
    1. Cristae
  3. Matrix
5. Lysosome
  1. Enter text here
6. Plasma Membrane
  1. PARTIALLY PERMIABLE
    1. controls movement of substances in and out of cell
  2. Phospholipid bilayer
7. Chloroplasts
  1. Found in plant cells
  2. Where photosynthesis takes place
Cytoskeleton

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	Created by jasukana over 10 years ago