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Cells (Cell basics (Unicellular organisms (May use several methods to move…

- - - - To make these structures easier to see with a light microscope scientists often add a liquid stain to the specimen
        
        This is a kidney cell unstained
      - This kidney cell has been stained with methyl-red
  - - - This allows the light reflected by the mirror to shine through the specimen
      - The angle that the slice is made through the cell will determine what the section will look like when viewed under the microscope
  - - - A low SA: V ratio indicates that the cell will be unable to supply nutrients and remove wastes fast enough to meet its needs (and this ratio gets smaller as the cell gets larger)
        
        As a cell increases in length its surface area does not increase to the same extent as its volume
        
        Larger organisms tend to have lower surface area to volume ratios. This makes it difficult or impossible for large cells to absorb nutrients and remove wastes quickly enough to stay alive. In order to have a high surface area to volume ratio cells must be small
  - - - Organisms that live in water are called aquatic
    - - Flagella
        
        Long tail that protrudes from the cell used to propel organism forward
        
        Example of flaella
      - Cilia
        
        Cilia in lung bronchiole
    - - An amoeba is an example of an organism that preys on other unicellular organisms for food
        
        An amoeba