Transcript Diffusion with Eggs Lab

Learning Targets
“I Can. . .”
-Define “selective permeability.”
-Model a living cell by using eggs with a dissolved
shell.
-Predict the results of an experiment that involves
the movement of water through a membrane.
-Recognize cells that are in a hypotonic,
hypertonic, and isotonic solution.
Diffusion and Osmosis with
Eggs
Background
• Some things can pass through the cell
membrane and some things cannot; this is
called selective permeability.
• As chemicals pass into and out of a cell,
they move from areas of high
concentration to areas of low
concentration. This process is called
diffusion.
• Water can also move into and out of the
cell by osmosis.
Modifications to Procedures
• Goggles and aprons are NOT necessary
• Use cups instead of beakers
• Add enough vinegar to cover egg
Results
Elodea Cells
Osmosis in Plant Cells
Osmosis in Animal Cells
Blood Cells
Blood Cells
Blood Cells