Cell Membranes: Diffusion and Osmosis

Catalog #STO-112

Create a model cell to observe diffusion through a membrane.

Time To Complete Time to complete: Two 40-minute periods + homework

What molecules can pass through the pores of a cell membrane? Create a model cell and perfom tests to determine what molecules diffused into or out of your model cell.

How does osmosis (diffusion of water) affect plant and animal cells placed in different environments?

  • Predict what molecules might pass through the cell model membrane.
  • Perform lab tests to determine if your predictions are correct.
  • Observe what happens when plant cells are placed in environments that have different salt concentrations.
  • Explain how diffusion and osmosis can be applied to real-world scenarios.
Teacher Guide Know Before You Buy! Download Teacher Guide

Limit 1 free sample per customer

Quantity Price
1 - 9$12.60 ea.
10 - 24$11.97 ea.
25 - 1000$11.34 ea.

Each assembled kit contains:

  • Student instructions
  • Dialysis tubing
  • 1 starch packing peanut
  • 1 plastic cup
  • 1 small measuring cup
  • 1 tube of simulated “Glucose”
  • 1 strip of simulated “Glucose Indicator Paper”
  • Iodine
  • 1 stirrer
  • 1 dropper
  • Osmosis and Red Onion Cells graphics sheet

Also required: Warm water, safety goggles

Buy Unassembled and Save!

Refill Your Kit

Cell Membranes: Diffusion and Osmosis – Pack of 10 Unassembled Kits

Catalog # STO-112U

Unassembled packs contain materials for 10 kits.

  • All supplies, lab materials, and printed labels
  • Student instructions copy master
  • Easy to follow instructions for kit assembly
Quantity Price
1 - 9$84.00 ea.
10 - 1000$79.80 ea.

Cell Membranes: Diffusion and Osmosis – 10 Kit Refill Pack

Catalog # STO-112R

Refill packs contain materials to replace consumable supplies for 10 kits.

Quantity Price
1 - 9$29.40 ea.
10 - 1000$27.93 ea.

Teacher Testimonial

I thought they were excellent- good follow through questions! I use them as introductory lead-ins.

- High School biology teacher (OK)

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STO-112