divendres, 9 d’octubre de 2015

OSMOSI


Hello! We’re  the students of 1st Batxillerat and we are going to explain our experiment about the osmosis.
The osmosis is the process by which two solutions saparated by a membran tend to equialize.
 Here we have the three types of osmosis:



  -When the external solution has more salt than the internal solution. When this happens the cell expels water to equialize the external and the internal solutions. Here we have a photo of this procces called plasmolysis:



       -When the internal solution has more salt than the external solution. When this happens the cell tale water from the external solution, that’s very dangerous because the cell swells up and it can explote (that's almost impossible because of the cellular wall). Here we have a photo of this procces called turgidity:
   






  -When the internal solution has the same concentration of salt than the external solution. The cell doesn’t change, here we can see a photo:



 




 

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