Abstract: A biological chemosensorial reaction can be produced using a process and a chip system for the controlled emission of a substance or a mixture of substances that work chemosensorially. The chip system emits, in a controlled as well as programmable manner, the substance or a mixture of substances that trigger a biochemical transduction at a chemosensory receptor for a neuronally transmitted signal to a specific structure of the central nervous system. The new process and its devices render numerous new applications possible within the medical and biological areas for chemosensorially active substances.