Circadian effects of hydrocortisone on the blood of the newt,Notophthalmus viridescens
β Scribed by Charlene Reed; Miriam F. Bennett
- Publisher
- Springer
- Year
- 1973
- Tongue
- English
- Weight
- 286 KB
- Volume
- 86
- Category
- Article
- ISSN
- 0340-7594
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## Abstract Five distinguishable stages of tail regeneration in the adult newt have been established. The stages are based on external morphological changes and internal histological characteristics rather than chronological age of the regenerate.
Sodium influx and efflux of the red-spotted newt, Notophthalmus viridescens, at two pHs were investigated in efts and adults in water and on land. The sodium efflux rate constant was not affected by pH. Efflux was generally greater under aquatic than terrestrial conditions, and for efts than for adu
## Abstract Some aspects of the influence of position on regeneration have been examined by comparing regeneration from different levels along the newt tail. Tails amputated such that either threeβfourths, oneβhalf or oneβfourth of the tail was removed pass through the same morphological and histol