Chemically coded transmitter systems.
D000818:Animals; D001921:Brain / Q000378:metabolism / Q000502:physiology*; D002450:Cell Communication; D009474:Neurons / Q000378:metabolism; D009490:Neurosecretory Systems / Q000502:physiology*; D018377:Neurotransmitter Agents / Q000378:metabolism / Q000502:physiology*
D018377:Neurotransmitter Agents