What hormone produced by both the adrenal glands and certain neurons is released by chromaffin cells?
Chromaffin cell:  The chromaffin cells release catecholamines: ~80% of Adrenaline (Epinephrine) and ~20% of Noradrenaline (Norepinephrine) into systemic circulation for systemic effects on multiple organs (similarly to secretory neurones of the hypothalamus), and can also send paracrine signals.
i don't know