Adrenal, thyroid, and testicular hormone rhythms in male golden hamsters on long and short days.

@article{Ottenweller1987AdrenalTA,
  title={Adrenal, thyroid, and testicular hormone rhythms in male golden hamsters on long and short days.},
  author={John E. Ottenweller and Walter N. Tapp and Deborah Pitman and Benjamin H. Natelson},
  journal={The American journal of physiology},
  year={1987},
  volume={253 2 Pt 2},
  pages={R321-8}
}
Plasma concentrations of adrenal, thyroid, and testicular hormones were measured at 4-h intervals around the clock in male hamsters on long (14:10-h light-dark cycle) and short (10:14-h light-dark cycle) days. Plasma corticosterone, cortisol, thyroxine (T4), triiodothyronine (T3), and testosterone rhythms were present on long days. The only one of these hormones to have a significant rhythm on short days was cortisol, but even its amplitude was suppressed compared with the cortisol rhythm on… CONTINUE READING

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