The scope and volume of cell layer of the quiescent zone rose and the volume of cell nucleus, especially the nucleolus, and chromatin in the karyolymph increased; The density of membrane structure became large. 此时细胞内的细胞核、尤其是核仁的体积增大,核液中的染色物质增加;膜结构的密度加大;线粒体的数量增多而质粒的体积变小。