@inbook{10.2307/j.ctt5hj92z.11,
 ISBN = {9780813542812},
 URL = {http://www.jstor.org/stable/j.ctt5hj92z.11},
 abstract = {Among the many physiological functions of the kidney—including those that are subject to feedback control—one is preeminent and omnipresent from birth to death. This is the need to maintain the homeostasis of body water and body electrolytes. Except for short-lived maladjustments, water and electrolyte balance among intracellular, extracellular, and intravascular spaces must be maintained twenty-four hours a day throughout a lifetime. Challenges to such a balancing act are presented by the daily cycles of hydration and dehydration we all experience. Consider the states of sleep and wakefulness. During the typical six to eight hours of sleep average adults},
 bookauthor = {GARY F. MERRILL},
 booktitle = {Our Marvelous Bodies: An Introduction to the Physiology of Human Health},
 pages = {94--108},
 publisher = {Rutgers University Press},
 title = {Kidneys and Renal Physiology},
 year = {2008}
}