Radiation accelerates her healing/regeneration process. NGF promotes peripheral nerve regeneration in rats. It revealed species-specific genetic pathways that may be responsible for limb regeneration. RANKL has been identified to affect the immune system and control bone regeneration and remodeling. Schwann cells are known for their roles in supporting nerve regeneration. Recovery of braking energy (recuperation or regeneration) helps with both. Adult neurogenesis is also a form of cellular regeneration. Sonic hedgehog may play a role in mammalian hair cell regeneration. Rates of regeneration and replication determine the organism's ability to survive. They are ecologically beneficial by assisting in the regeneration of forests via seed dispersal. This process is known as passive regeneration. Fibrosis is necessary in many aspects of intrabody regeneration. The cycle ends with regeneration of oxaloacetate. There are three phases to the regeneration process. Macrophage polarization is a strategy for skin regeneration.