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Science 30 January 1981:
Vol. 211. no. 4481, pp. 489 - 491
DOI: 10.1126/science.7455689
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Articles

Science, Vol 211, Issue 4481, 489-491
Copyright © 1981 by American Association for the Advancement of Science

articles

Water intake in hypovolemic sheep: effects of crushing the left atrial appendage

MB Zimmerman, EH Blaine, and EM Stricker

Sheep increased their water intake in proportion to the amount of protein-free, isosmotic fluid that was removed from their blood by ultrafiltration. This behavioral response to hypovolemia was eliminated by crushing the left atrial appendage of the heart. The surgical maneuver had no effect on basal water intake or on the drinking response to a salt load. These findings suggest that left atrial stretch receptors, which influence secretion of antidiuretic hormone when stimulated, may also play an important role in mediating thirst during hypovolemia.


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