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Biol Bull 133: 245-254. (August 1967)
© 1967 Marine Biological Laboratory
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NA+- AND K+-STIMULATED RESPIRATION IN THE EXCISED GILL OF THE LAND CRAB, CARDISOMA GUANHUMI

D. J. QUINN 1 and C. E. LANE 1

1 Institute of Marine Science, University of Miami, Miami, Florida 33149

1. The Q02 of excised Cardisoma guanhumi gill tissue is higher in hypo-osmotic than in hyperosmotic sea water.

2. Gill tissue Q02 is maximally stimulated by Na+; K+ does not stimulate Q02 addition of Na+ and K+ simultaneously causes no greater stimulation of oxygen uptake than that following Na+ alone.

3. Ouabain, a Na+ transport inhibitor, reduces Na+-, and Na+ + K+stimulated gill tissue respiration. In addition, Q02 of gill tissue measured in 75% sea water is reduced by ouabain.






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Copyright © 1967 by the Marine Biological Laboratory.