Calcium and frequency-dependent release of norepinephrine.
D000818:Animals; D002118:Calcium / Q000502:physiology*; D002415:Cats; D004558:Electric Stimulation; D009638:Norepinephrine / Q000378:metabolism*; D013154:Spleen / Q000378:metabolism* / Q000502:physiology
D002118:Calcium; D009638:Norepinephrine