``Tracer Methods in Permeability,'' by Brindell Horelick and Sinan Koont, UMAP 74. This module describes a technique for measuring the permeability of red corpuscle surfaces to K⁴² ions, using radioactive tracers. Students learn how radioactive tracers can be used to monitor substances in the body and learn some of the limitations and strengths of the model described in this unit.

In Projects 2–5, complete the requirements of the designated UMAP module (see enclosed CD for UMAP modules).