This bundle of documents contains a worksheet on the structure of cell membranes. Building upon this fundamental knowledge, a PowerPoint Show explains how substances can cross biological membranes. It supports an understanding of these different mechanisms of transportation with animated sketches. So, you can read about it AND you can watch it happen. (The animation of these transport processes only works with the full version of MS Office.)

The accompanying worksheet "Transport of Substances through Membranes - Worksheet" (solutions included) not only aims at summarizing the information provided in the presentation but also applies it to exercises and experimental data for evaluation.