Intracellular Stimulation of an Identified Neuron Evokes Cardioacceleratory Peptide Release

Abstract
The central nervous system of the tobacco hawkmoth, Manduca sexta , is known to contain two cardioacceleratory peptides (CAP's), both of which function in vivo as cardioregulatory neurohormones. Intracellular electrical stimulation of a single abdominal ganglion neuron evokes the release of CAP-like bioactivity. This stimulation-evoked bioactivity is destroyed by prior treatment with protease. The possibility that intracellular stimulation of a CAP-containing neuron synaptically activated additional spiking neurons is eliminated.