Thyroidectomy prevents the development of photorefractoriness and the associated rise in plasma prolactin in starlings
โ Scribed by Arthur R. Goldsmith; Trevor J. Nicholls
- Book ID
- 113158239
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 901 KB
- Volume
- 54
- Category
- Article
- ISSN
- 0016-6480
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๐ SIMILAR VOLUMES
Responsivity to photostimulation in previously photorefractory European starlings is caused by subjection to short daylengths and is characterized by a marked activation of the hypothalamus in terms of synthesis of gonadotropin releasing hormone. This active hypothalamic state is amplified for a tim
Thyroidectomized starlings on long days do not become photorefractory. Four experiments were done to investigate the roles of thyroxine and daylength in the development of photorefractoriness. 1) Pharmacological doses of thyroxine administered to thyroidectomized starlings on long days induced photo
Thyroidectomy of Starlings prior to exposure to long photoperiods (17L:7D) resulted in a failure of testes to regress after a n initial size increase. Thyroidectomy after four weeks of such exposure resulted i n testicular regression followed by a second period of size increase. Testicular size was