Antegrade peristalsis due to?: (A) Ach, (B) Serotonin, (C) Substance P, (D) VIP
Answer is A. - Excitatory neurotransmitters in ENS are Acetylcholine & substance P - Inhibitory neurotransmitters in enteric nervous system are NO & VIP - Acetylcholine is main excitatory neurotransmitter responsible for antegrade peristalsis