Designed to bridge the gap between basic biochemistry, molecular and cell biology and organs and systems physiology, this concise textbook presents the essential concepts of cell biology as they apply to physiological processes. Frequent examples from systems physiology, pharmacology and pathophysiology illustrate the fundamental concepts. Mathematical derivations are presented in separate boxes for verification. Learning tools in each chapter are supplemented with an extensive appendix that includes multiple choice questions with answers, a review of mathematical techniques and a summary of basic circuit theory.