STUDIES IN THE REGULATION OF BLOOD-SUGAR CONCENTRATION IN CRUSTACEANS. I. NORMAL VALUES AND EXPERIMENTAL HYPERGLYCEMIA IN LIBINIA EMARGINATA
- 1 June 1949
- journal article
- research article
- Published by University of Chicago Press in The Biological Bulletin
- Vol. 96 (3) , 218-227
- https://doi.org/10.2307/1538355
Abstract
Removal of the sinus glands by eyestalk ablation in unfed L. emarginata has no significant effect on the blood-sugar concn. when compared with similarly unfed controls. Values for true blood sugar were determined after yeast fermentation of blood samples. In starved animals the concn. of total reducing substances is between 8-9 mg.%; that of non-fermentable reducing substances, 6-7 mg.%; that for true blood sugar is therefore about 2 mg.%. Injn. of eyestalk extract increases the concn. of total reducing substances in the blood. This increase is in the fermentable component, amounting to over 400% of that in the uninjected animal, and thus represents a true hypergly-cemia. Asphyxia also causes hyperglycemia, the total reducing substances in blood samples being 2-3 times the concn. preceding asphyxia. Removing the sinus gland by eyestalk ablation prevents the appearance of the hyperglycemia of asphyxia. The sinus gland may be a mediator in certain hyperglycemic responses of crustaceans, but does not seem to be concerned in alimentary hyperglycemia.Keywords
This publication has 1 reference indexed in Scilit:
- THE OCCURRENCE OF A DIABETOGENIC FACTOR IN THE EYESTALKS OF CRUSTACEANSThe Biological Bulletin, 1944