The brain and the spinal cord make up the which controls and commands bodily functions. in which nervous system.

The given blank can be filled with the central nervous system.  

The CNS or the central nervous system is the component of the nervous system comprising the spinal cord and the brain. It is so named as it integrates information it attains from, and coordinates and affects the function of all the parts of the body of all the species except the sponges and radially symmetrical species.  

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.