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Animal Osmoregulation$
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Timothy J. Bradley

Print publication date: 2008

Print ISBN-13: 9780198569961

Published to Oxford Scholarship Online: April 2010

DOI: 10.1093/acprof:oso/9780198569961.001.0001

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The need for, and often conflicting issues of, osmoregulation and volume regulation The need for, and often conflicting issues of, osmoregulation and volume regulation

The need for, and often conflicting issues of, osmoregulation and volume regulation The need for, and often conflicting issues of, osmoregulation and volume regulation

Chapter:
(p.52) 4 The need for, and often conflicting issues of, osmoregulation and volume regulation
Source:
Animal Osmoregulation
Author(s):

Timothy J. Bradley

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780198569961.003.0004

If differences in the activity of water exist across a semi-permeable membrane, movement of water by osmosis will result. Cells, and indeed entire organisms, must therefore regulate the activity of water in order to maintain appropriate cell and body volume. The body plans of animals vary substantially between phyla, yet the laws governing osmotic flux remain the same. The key to the regulation of the activity of water is the regulation of solutes in body and cellular compartments. Certain types of solutes are termed compatible solutes because they can occur in bodily fluids in relatively high concentrations yet they do not denature proteins or disrupt membrane structure.

Keywords:   osmotic regulation, volume regulation, body plans, fluid compartments, compatible solutes

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