Title variants
Languages of publication
Abstracts
Thyroxine is known to play an important role during the developmental process of amphibians. The present work is designed on the hypothesis that a functional relationship exists between the thyroid gland and digestive physiology in the adult toad. Three doses of thyroxine (25 mug/100 g; 50 mug/100 g; 100 mug/100 mug body weight) were orally dministered daily to the adult male toad, Bufo melanostictus and changes in -amylase, pepsin, trypsin, and esterase activities of the different zones of the digestive tract, pancreas and liver were observed. The observations were made on 7, 15, and 30 days of thyroxine treatment. The result shows that the dose of 25 mug increases the enzyme activities in the gastrointestinal tract, liver and pancreas of 7 days treatment. However, prolonged treatment with all the doses shows little effect on these enzymes. The pattern of changes in the enzymatic activities in the digestive tract of the adult male toads show more advanced compartmentalization than that of fishes. It is also found that site-specific enzyme production is not pronounced in this amphibious vertebrate. It is proposed that a positive functional relationship between thyroxine and digestive enzymes exists in the adult male toad.
Journal
Year
Volume
Issue
Pages
83-90
Physical description
Contributors
References
Document Type
ARTICLE
Publication order reference
K. K.Misra, Department of Zoology, R. B. C. College, Naihati 743 165, West Bengal, India
Identifiers
YADDA identifier
bwmeta1.element.element-from-psjc-977ce653-a62c-34f6-93d8-a496c31778d4
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.