T E X T 0 K of medical Physiology E LE VENTH EDTION Arthur C. Guyton, M.D.t Professor emeritus Department of physiology and biophysics University of Mississippi Medical Center Jackson, Mississippi Deceased John e hall ph D Professor and Chairman Department of Physiology and Biophysics University of Mississippi Medical Center Jackson, Mississippi ELSEVIER SAUNDERSTEXTBOOK of Medical Physiology ELEVENTH EDITION Arthur C. Guyton, M.D.† Professor Emeritus Department of Physiology and Biophysics University of Mississippi Medical Center Jackson, Mississippi † Deceased John E. Hall, Ph.D. Professor and Chairman Department of Physiology and Biophysics University of Mississippi Medical Center Jackson, Mississippi