title: Effects of leech Retzius cells on body wall muscles.
mesh_terms: D000200:Action Potentials; D000818:Animals; D004558:Electric Stimulation; D007865:Leeches / Q000502:physiology*; D009119:Muscle Contraction / Q000187:drug effects; D009129:Muscle Tonus; D009132:Muscles / Q000502:physiology; D009474:Neurons / Q000502:physiology*; D012701:Serotonin / Q000494:pharmacology; D009435:Synaptic Transmission
chemical_list: D012701:Serotonin