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Effects of administration of insulin and glucagon in the water snake, Cerberus rhynchops (Schneiderr)



Effects of administration of insulin and glucagon in the water snake, Cerberus rhynchops (Schneiderr)



Journal of Advanced Zoology 21(2): 108-114



Insulin at a dose of IU/Kg/day for 4 days and sacrifice on the fifth day had no effect either on the glycemia or on the glycogen contents of liver and muscle. But, a higher multiple dose of 80 IU/Kg/day for 4 days and sacrifice on the fifth day resulted in a significant hypoglycemia. Further, insulin administration resulted in an increase in the glycogen concentration of both the liver and muscle. The rise in the glycogen concentration can be explained as that brought about by the formation of new glycongen from sugar and lactate. The beta cells of the pancreatic islet showed degenerative changes after the administration of multiple doses of insulin. Alpha cells showed a normal picture. These degenerative changes in the beta cells give indirect evidence that the beta cells are concerned with the production of insulin. A single injection of insulin (80 IU/Kg) resulted in a maximal hypoglycemia at the 48 hrs stage and the reestablishment of the blood sugar level took place after seven days. Glucagon administration (2mg/Kg.) elicited a significant hyperglycemia in the snake, Cerberus rhynchops after two hours accompanied by degranulation in the beta cells and a depletion in the glycogen concentration in the liver. The hyperglycemia following glucagen administration is due to glycogenolysis in the liver.

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Accession: 010544385

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