Type of cell that enters the G0 cycle such as brain cell?
Most of the cells in our body are in G0 phase, when they are not dividing or preparing to divide. However, the ability of the cell to re-enter the cell cycle depends on the cell type. For example, a nerve cell, cardiac muscle cell, or a skeletal muscle cell are permanently in G0 phase and have dismantled their cell cycle control system so that they cannot re-enter the cell cycle. On the other hand, most liver cells are in G0 phase but they can re-enter the cell cycle and divide if the liver is damaged. Furthermore, lymphocytes exit and re-enter continually throughout their lifespans.