Diffusion through a Membrane Simulation

Cell

Starch Starch Molecules

Starch Glucose Glucose Molecules

Starch Glucose Iodine Iodine Molecules

Starch Give it some time……. Glucose Iodine

Starch Glucose Iodine

Starch Glucose Iodine

Starch Glucose Iodine

Starch Glucose Iodine

Starch Glucose Iodine

Starch Glucose Iodine

Starch Glucose Iodine

Starch Glucose Iodine

Starch Times Up! Glucose Iodine

Starch Glucose Iodine

What Diffused in and out the Cell? Starch Glucose Iodine

Starch Glucose Iodine

Starch Diffused IN Glucose Iodine Water

Starch Glucose Iodine

Starch Diffused OUT Glucose Iodine

Starch Glucose Iodine

Starch Didn’t Diffuse at All Glucose Iodine

Starch Glucose Iodine

Lets look at the epidermis of a Red Onion….Up Close. What about a real Cell? Lets look at the epidermis of a Red Onion….Up Close.

If we make a wet mount slide of a Red Onion Epidermis it would look like this: These cells are HYPOTONIC (swollen like a hippo) because there is so much water around them

If salt water is added, there will be more salt outside the cell than in. The cell loses water through osmosis as it tries to create a ratio of water:salt inside the cell that matches the outside

This Process is Called Plasmolysis

What if we add water without salt?