Abstract
Conclusions
1. Ram pipiens tadpoles, metamorphosed with dessicated thyroid-diiodotyrosine exhibit a progressive rise in metabolic rate as evidenced by oxygen consumption per gram weight. In stage 8 the metabolic rate reaches a maximum increase over that of stage 1 of approximately 79 per cent.
2. Precociously metamorphosed tadpoles increase their total oxygen consumption regardless of decreasing weight.
3. Thyroid-diiodotyrosine-fed tadpoles undergo a gradual decrease in weight amounting to 57 per cent in stage 8.
4. Etherization of stage 1 tadpoles (normal animals) results in approximately 19 per cent increased oxygen consumption.
Get full access to this article
View all access options for this article.