This new edition of the classic introductory text to bioelectricity (electrophysiology) is aimed at biomedical engineering students. It expands on the developments since the successful last edition. The book is authored by two eminent biomedical engineering professors at Duke University who discuss many topics that are central to biophysics and bioengineering and the quantitative methods employed. In addition, this classic text will be complemented by a Bioelectricity Solutions Manual, sure to aid the speed and assimilation of the "Teaching Text" material to the new Biomedical Engineering student. In the first edition of Bioelectricity, Plonsey and Barr provided an introduction to electrophysiology following a quantitative approach. In the second edition they address new discoveries in the field of ion channels and provide an introduction to electrophysiology utilizing a quantitative approach.