Chapter 11, Problem 18RQ

You have discovered a neuron that innervates an endocrine cell in the intestine. To learn more about this neuron, you place a marker substance at the endocrine cell synapse. The marker is taken into the neuron and transported in a vesicle by retrograde axonal transport to the nerve cell body.

1. a. By what process is the marker probably taken into the axon terminal?
2. b. The nerve cell body is found in a ganglion very close to the endocrine cell. To which branch of the peripheral nervous system does the neuron probably belong? (Be as specific as you can.)
3. c. Which neurotransmitter do you predict will be secreted by the neuron onto the endocrine cell?