Physiology is the study of how biological systems perform their functions to maintain the steady-state internal environment of living organisms. We can study these processes at the genetic, cellular, organ system or whole-animal level. Our departmental name reflects the increasing application of molecular biology techniques in the understanding of physiological function. Understanding the basic concepts of physiological control of organ systems in the human body is key to identifying regulatory processes during organ dysfunction and disease states which, in turn, may elucidate a novel approach in therapeutic intervention.