Diffusion, Osmosis and Cell Membranes
by John R. McCandless, Jr.
In this unit, the students will explore some of the properties and
processes of the cell membrane including permeability, passive transport,
equilibrium, diffusion, osmosis, cell tonicity and rates of diffusion.
The students perform a number of laboratory activities intended to lead
them, through exploration and analysis, to a thorough understanding of
the importance of a cell membrane and the physical processes of diffusion
The unit includes both teacher and student materials. Teacher materials include background information, scheduling suggestions, preparation instructions, evaluation keys, and a resource list. Student materials include a background reading sheet, several exploratory activities with evaluation questions, a culminating experiment, and a quiz.
Organization of the Unit
. This unit book is organized into:
The University of Arizona
Department of Biochemistry and Molecular Biophysics
General Biology Program for Secondary Teachers