Studies of Hypothalamic Magnocellular Neurons Have Used Radioimmunoassay to Show

Studies of hypothalamic magnocellular neurons have used radioimmunoassay to show that

A) vesicles may travel long distances from release sites to receptor sites.
B) magnocellular neurons are able to synthesize and release more than one peptide at once.
C) more vesicles are released at cell bodies than at dendrites.
D) trains of action potentials are needed to produce exocytosis.
E) extrasynaptic transmission uses dense-core, rather than clear, vesicles.