Osmosis & Diffusion
684262 Exploring Osmosis Activity Kit
Exploring Osmosis Activity Kit Using an innovative osmometer, students calculate the rate of osmosis
between a “cell” and its immediate environment. Students analyze their data through graphing and asking questions, and they utilize the information gained to understand cellular processes. This 8-station kit contains enough materials for a class of 32 students working in small groups.
Osmometers Dialysis Tubing Food Coloring Pipets (1 mL) Sucrose
Instructions 684262 Per kit From 684257 Diffusion Mini-Chamber Kit
Diffusion Mini-Chamber Kit Demonstrates the passage of ions and small molecules through selectively permeable membranes separating 2 solutions, while the movement of larger molecules in solu- tion is restricted by the membranes. The investigator fills 3 dialysis tubes with dilute chemical solutions and arranges them side by side in a clear plastic chamber. Within min- utes, permeating chemicals diffuse from 1 tube into any adjacent tube. Chemicals brought together by diffusion may produce a brightly colored precipitate, or diffusion may be verified by other specific tests described in the instruc- tions. Chemical solutions provided for dilution are dextrose, sodium bicarbonate, starch, a pH indicator, potassium fer- rocyanide, Lugol’s iodine, and iron chloride. Materials are sufficient for at least 7 separate runs of the chamber.
684257 Per kit Diffusion Demonstration Kit
This kit features a uniquely designed apparatus and cellulose membrane to clearly demonstrate to students the processes of selective permeability and diffusion. Excellent for a classroom demonstration or for use by a team of 4 to 8 students. The standard exercise is easily completed within 1 hr. The Replacement Set for 2 repeats of the exercises includes chemical solutions, water, dialysis tubing, twist closures, pressure pad replacement, and instructions. Kit includes:
Solutions of lodine, Starch, and Sodium Bicarbonate
201108 Active Transport in Yeast Kit Active Transport in Yeast Kit
For a class of 30 students working in pairs. Students study active transport as a method of transporting materials across a cell membrane. Using Congo Red (a cytoplasmic stain), they predict, observe, and compare how active and inactive yeast cells carry out the essential cell process of active transport. Students then discuss various ways that humans and other organisms use active transport to support life processes. Kit includes:
Needed but not included:
Packet Activated Dry Yeast Microscope Slides Coverslips
15 Dropper Bottles of Congo Red 30 Test Tubes Bibulous Paper 30 Plastic Pipets
201108 Per kit 100% satisfaction guaranteed 15 Hot Plates and Beakers (recommended—
or 15 Bunsen burners, matches, and test tube clamps) Scale (capable of weighing to 0.10 g) 15 Test Tube Racks
15 Graduated Cylinders (measuring to 25 mL) 15 Compound Microscopes (up to 400× total magnification)
Teacher’s Manual and Reproducible Springwater Student Guide
m-Cresol Purple (pH indicator)
Potassium Ferrocyanide Ferric Chloride Deionized Water Dialysis Tubing and Twist Closures Reusable Plastic
Demonstration Case with Absorbent Pad and Pressure Pad Elastic Bands
Teacher’s Manual with Reproducible Student Guide
684255 Replacement Set Each 684250 Diffusion Demonstration Kit
Needed but not included: Distilled Water Mobile Light Source Paper Towels Markers
684250 Kit Each valuable teacher resources:
carolina.com 45
Results from 684257 Diffusion Mini- Chamber Kit
Physiology
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