Studies have revealed distinct mutation processes operating in somatic and germline cells. Factors and mechanisms controlling cell differentiation in somatic embryos are relatively ambiguous. Those species with a separation between sterile somatic cells and a germline are called Weismannists. Germline mutation is distinct from somatic mutation. Such single gene disorders are good candidates for somatic cell therapy. First, cancer is a disease of accumulated somatic mutations in genes. BCR and TCR are both highly variable antigen receptors diversified by somatic V(D)J recombination. These cells normally engulf B cells that have undergone apoptosis after somatic hypermutation. Deregulation of telomerase expression in somatic cells may be involved in oncogenesis. Physiologically, urination involves coordination between the central, autonomic, and somatic nervous systems. They can be divided into somatic and genetic effects. Shortening of the telomeres is a normal process in somatic cells. The PNS is further subdivided into the somatic and autonomic nervous systems. The abducens nerve carries axons of type GSE, general somatic efferent. People with bulimia may also react negatively to somatic and affective states.