Calcium, parathyroid hormone, and sympathoadrenal system.
D002118:Calcium / Q000378:metabolism / Q000494:pharmacology*; D006801:Humans; D009638:Norepinephrine / Q000378:metabolism / Q000494:pharmacology; D010281:Parathyroid Hormone / Q000502:physiology*; D013564:Sympathetic Nervous System / Q000502:physiology*
D010281:Parathyroid Hormone; D002118:Calcium; D009638:Norepinephrine