Answer:
Excitatory.
Step-by-step explanation:
Most of the signals synapses between neurons are either excitatory or inhibitory that are opposite to others. Inhibitory signals work to cancel the signal and excitatory neurotransmitters to cause the signal propagates.
Neurons communicate with each other with the help of electrical events called action potential. This phenomenon is generated through the flow of positively charged ion, across the neuronal membrane.
Information from one neuron to another neuron across a small gap, called synapse in which electrical signals are converted into chemical signals. On the other side the signal becomes electrical again.