Rasterelektronenmikroskopische Untersuchung der Oberflächenveränderungen von Schilddrüsenepithelzellen der Ratte nach 6- bis 48-stündiger Kälteeinwirkung

摘要

Scanning electron microscopic observations of thyroid follicle cells of rats exposed to 4° C for 6 to 48 hours were found to show an increased number of apical microvilli in comparison to those of controls kept at 22° C. These ultrastructural differences — which were statistically significant 48 hours after start of the experiments — are related to stimulation of thyroid gland activity by exposure to