Physiology is the study of any biological process that is associated with the functioning of an organism. It can span many levels of complexity ranging from (but not limited to) processes shaping neurotransmission in the nervous system, to mechanisms regulating the blood supply of an organism, to endocrine regulation, to pathophysiology in disease conditions, and to studies of drug clearance from tissues. In being fundamental to understanding the function of the human body, physiology forms the basis for medicine. Modern molecular biological tools have opened up the study of cellular and organ level function with extraordinary precision as well as with extraordinary breadth. Research of faculty in the physiology focus group spans multiple areas ranging from molecular and cellular physiology to systems level thereby linking molecular and cellular mechanisms to the function and dysfunction of organs and ultimately the whole organism.