<prompt> Synaptic transmission in the autonomic ganglion is usuallyAdrenergicpeptidergicCholinergicMediated by substance P  <response>: Ref:KD Tripathi pharmacology 7th edition page.no: 121 Katzung 10e p76 Acetylcholine is the primary excitatory neurotransmitter in both sympathetic and parasympathetic ganglia Other adrenergic , peptidergic receptors bring secondary , slowly developing changes in membrane potential in ganglia 