WordNet

tell a relatively insignificant lie; "Fibbing is not acceptable, even if you dont call it lying"
a trivial lie; "he told a fib about eating his spinach"; "how can I stop my child from telling stories?" (同)story, tale, tarradiddle, taradiddle
a slender and greatly elongated substance capable of being spun into yarn (同)fibre
a leatherlike material made by compressing layers of paper or cloth (同)fibre, vulcanized fiber
any of several elongated, threadlike cells (especially a muscle fiber or a nerve fiber) (同)fibre
beyond or distal to a ganglion (referring especially to the unmyelinated fibers that originate from cells in autonomic ganglia)

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2013/08/03 03:45:25」(JST)

Acetylcholine

Norepinephrine

In the autonomic nervous system, fibers from the ganglion to the effector organ are called postganglionic fibers.

The neurotransmitters of postganglionic fibers differ:

In the parasympathetic division, neurons are cholinergic (that is, acetylcholine is the primary neurotransmitter.)

In the sympathetic division, neurons are mostly adrenergic (that is, epinephrine and norepinephrine function as the primary neurotransmitters.) One exception to this rule is the sympathetic innervation of sweat glands, where acetylcholine is the neurotransmitter at both pre and post ganglionic synapses. Another exception is the sympathetic innervation of the medulla of the adrenal glands, which is accomplished by preganglionic fibers, and subsequently uses acetylcholine as a neurotransmitter. The cells of the adrenal medulla are actually modified postganglionic neurons which secrete epinephrine and norepinephrine directly into the blood stream rather than into a synapse.^[1]

^ Noback, Charles (2005). The Human Nervous System: Structure and Function (6th ed.). New Jersey: Humana Press. ISBN 978-1588290403. More than one of |author= and |last= specified (help)

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