“…By contrast, when the sympathetic nerve is active, acupuncture activates the opposite system of the parasympathetic system, stimulating peristalsis, thus maintaining the homeostasis of the body. These results finally indicate that acupuncture affects the activity of physiological processes, at least to a certain extent via parasympathetic cholinergic fibers (Lee et al, 2005;Takewaki et al, 2005). According to modern knowledge, it is actually accepted that the three gases, commonly known as a toxic gases, carbon monoxide (CO), nitric monoxide (NO), and hydrogen sulfide (H 2 S), are generated endogenously in living organisms by stimulating receptors of the cholinergic system (Mustafa, Gadalla, & Snyder, 2009;Szabo, 2010).…”