NeurosecretionChromaffin CellsSynaptosomal-Associated Protein 25PC12 CellsExocytosisNeurosecretory SystemsSyntaxin 1Synaptic VesiclesSecretory VesiclesSNARE ProteinsGonadotropin-Releasing HormoneNeurotransmitter AgentsCalciumNeuronsNerve Tissue ProteinsHypothalamusMembrane ProteinsCattleHippocampusKATP ChannelsPotassium ChannelsAcetylcholineGold Colloid, RadioactiveMicrodialysis