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Professor Demarest earned his B.S. degree (magna cum laude) from Monmouth College and his Ph.D. from the University of California at Berkeley. He acquired additional training at the Duke University Marine Laboratory, the University of North Carolina School of Medicine, Chapel Hill and the Bodega Marine Laboratory of the University of California.

Dr. Demarest came to Juniata College in 1994 and he served as Chair of the Biology Department from 1994-2004. Previously Dr. Demarest served as an assistant research physiologist and lecturer at the University of California at Berkeley, a lecturer in the Department of Zoology at the University of California Davis; a consulting scientist at the Center for Ulcer Research and Education at U.C.L.A.; a visiting scientist at the Marine Biological Laboratory in Woods Hole, Mass.; a research associate in the department of medicine at the University of North Carolina, Chapel Hill; and as a biophysicist a the Bodega Marine Laboratory.

Dr .Demarest has presented more than 30 papers at professional scientific meetings and has published more than a dozen peer reviewed research papers, among which is a chapter in The Handbook of Physiology published by the American Physiological Society. He has also served as a referee for several scientific journals and as an hoc grant proposal reviewer for the National Science Foundation and National Institutes of Health.

He is a member of the American Association for the Advancement of Science, the American Physiological Society (where he served on the Education Committee), the Union of Concerned Scientists, the Council on Undergraduate Research and the Society of General Physiologists. Dr. Demarest is also a life member of the Sierra Club.

His primary research interests include cell biology and biophysics of gastrointestinal and renal epithelial transport, as well as comparative physiology of osmoregulation and electroreception in fish studied using molecular, electrophysiological and light microscopy techniques. His research and teaching have been supported by grants form the Howard Hughes Medical Institute, National Science Foundation, National Institutes of Health, The Marine Biological Laboratory, Smith-Klein-Beckman Foundation and the University of California Berkeley. Since he came to Juniata more than thirty students have performed independent research projects with Dr. Demarest (see

He is married to Martha Noble.