| http://digfir-published.macmillanusa.com/hm_custom_osu/hmlsu_wischusen_f13_lab6_prelab1.html | Chapter 2. Movement of Materials Across the Cell Membrane II
| 51ddb5be757a2ed518000001 |
| http://digfir-published.macmillanusa.com/hm_custom_osu/hmlsu_wischusen_f13_lab6_prelab1_dlap.xml | DLAP questions | 51ddb5be757a2ed518000001 |