Ekikyusabuziba kigenda mu maaso mu buziba oba mu atomu emu n’endala ne kiviirako endagakintu ez’enjawulo okuva mu mbeera. “Okuva mu mbeera”, n’olwekyo kikozesebwa mu essomabirowoozo (psychology) okutegeeza “becoming emotional” ne mu essomabuziba okutegeeza “ekikyusabuzibaa” (chemical reaction).