Learning Targets “I Can...” -Define “selective permeability.” -Model a living cell by using eggs with a dissolved shell. -Predict the results of an experiment.

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Presentation transcript:

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. 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

OsmosisOsmosis in Plant Cells

OsmosisOsmosis in Animal Cells

Blood Cells