1. Suppose axon A enters a ganglion (a cluster of neurons)

and axon B leaves on the other side. An experimenter who stimulates A can shortly thereafter record an impulse traveling down B. We want to know whether B is just an extension of axon A or whether A formed an excitatory synapse on some neuron in the ganglion, whose axon is axon B. How could an experimenter determine the answer? You should be able to think of more than one good method. Presume that the anatomy within the ganglion is so complex that you cannot simply trace the course of an axon through it.