<prompt> The principle that is the spinal cord dorsal roost are sensory and the ventral roots are motor is known asLaplaces lawBell-Magendie LawFrank-Starling LawWeber-Fechner Law  <response>: Ans. b Bell-Magendie LawRef: Ganong, 25th edp.229Bell-Magendie law:This law states that Spinal dorsal roots contain sensory fibers and ventral roots contain motor fibers 