Regulatory peptides.
D000818:Animals; D006706:Homeostasis; D006728:Hormones / Q000502:physiology*; D006801:Humans; D018377:Neurotransmitter Agents / Q000502:physiology; D010455:Peptides / Q000502:physiology*
D006728:Hormones; D018377:Neurotransmitter Agents; D010455:Peptides