Homeostasis - Osmoregulation

 

The experiment from this website has been tried and works well:

http://www.nuffieldfoundation.org/practical-biology/investigating-effect-concentration-blackcurrant-squash-osmosis-chipped-potatoes

This involves identifying how much Ribena needs to be diluted before it becomes isotonic to potato cubes. Student then do their own investigation with a fluid of their own choice (ie lemonade, orange juice etc) to determine the correct dilution to give to a dehydrated child (with the same solute concentration as the potatoes).