What are norepinephrine releasing fibers called?
Anatomically, the adrenal medulla develops from neural crest tissue, and it is directly controlled by sympathetic NS. The medullary cells respond to this stimulation by releasing epineprhrine (80%) or norepinephrine (20%), which can act in conjunction with the sympathetic NS to elicit the fight-or-flight response to stressors. epinephrine, from the adrenal medulla. Norepinephrine/Noradrenaline working with Epinephrine/Adrenaline epinephrine and norepinephrine
The sympathetic nervous system, as part of the peripheral nervous system, is composed of 2 types of nerves: pre-ganglionic & post-ganglionic. The preganglionic neurons release acetylcholine on postganglionic neurons to excite them. And the postganglionic neurons generally release adrenergic neurons (epinephrine or norepinephrine) on their target organs. In most cases the post-ganglionic release of epinephrine or norepinephrine acts as a neurotransmitter, except for one exception. When stimulated by preganglionic sympathetic fibers, the adrenal glands release…