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News Physiol Sci 5: 25-28, 1990;
1548-9213/90 $5.00
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News in Physiological Sciences, Vol 5, 25-28, Copyright © 1990 by International Union of Physiological Sciences

ARTICLES

The Cellular Basis of Endothermic Metabolism: A Role for "Leaky" Membranes?

AJ Hulbert and PL Else

The high metabolic rate of endotherms is largely a cellular characteristic as reflected by tissue mitochondrial parameters. The cells of endotherms appear to be considerably "leakier" to Na+ and K+ than those of ectothermic animals. Tissue metabolic rate is correlated with the "leakiness" of the cell membranes.


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