For students, this text offers a complimentary text-correlated CD-ROM, "PhysioEdge". Users will find text icons to mark animated figures on the CD. "PhysioEdge focuses on the most difficult concepts - including membranetransport and acid base balance. With a strong diagnostic component, students receive immediate feedback on their answers to quiz questions and as a student improves, the question difficulty increases accordingly. For instructors, the enhanced multimedia manager offers powerful PowerPoint slides for all the illustrations and figures from the text, plus several animations. A segmentation feature allows users to enlarge figure portions to show more detail and they can be drawn on to highlight ideas. A complementary copy of "InfoTrac" is also available. This rich database offers users access to hundreds of top periodicals like physiological reviews, science, and nature.