Homeostasis - Osmoregulation

Homeostasis - Osmoregulation: I am looking for an interesting and unique experiment relating to osmoregulation/salt-water balance. Do you have some recommendations?
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Publication Date: 25 February 2015
Asked By: Anonymous
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Homeostasis - Osmoregulation

Answer updated 17/01/2023

Potato Cubes and Ribena

The experiment from this website has been tried and works well: https://practicalbiology.org/exchange-of-materials/osmosis/investigating-the-effect-of-concentration-of-blackcurrant-squash-on-osmosis-in-chipped-potatoes

The experiment involves identifying how much Ribena needs to be diluted before it becomes isotonic to potato cubes.

Students then do their own investigation with a fluid of their own choice (i.e., lemonade, orange juice, etc.) to determine the correct dilution to give to a dehydrated child (i.e., with the same solute concentration as the potatoes).

Dissolving Egg Shells

This experiment uses vinegar to dissolve egg shells: https://untamedscience.com/biology/cells/osmosis/

The shell-less eggs are placed in hypotonic, hypertonic, and isotonic solutions, and the change in mass is observed. Note that this experiment requires attention over a few days (unless you prepare the eggs in advance for the class).

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