[Cellular renewal in the parenchyma and stroma of the parathyroid glands].

By means of autoradiographic, morphometric and cytophotometric methods main parameters, characterizing processes of cellular renewal have been studied in the parathyroid glands of 66 mature white male rats with body mass of 160-230 g. The time of renewal of the parathyrocyte population is 80-100 days, the average daily mitotic index--0.88 +/- 0.

[Restorative processes in the parathyroid glands in experimental hypothyroidism].

By means of morphological, morphometrical and autoradiographical methods restorative processes in the parathyroid glands in 41 euthyroid and in 41 hypothyroid rats have been studied during 1-24 days after mechanical trauma of the glands or after hemithyroparathyroidectomy. Seven hypothyroid and 7 euthyroid rats serve as a control. Hypothyroidism is produced with daily injection of mercazolil (6 mg/kg) 3 weeks before the operation and during the time of the experiment.