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The sympathetic motor neurons come from the thoracic through the lumbar region of the spinal cord.
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∙ 10y ago
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Do the sympathetic fibers leave the CNS at the thoracolumbar region?
All preganglionic sympathetic fibers leave the CNS at the thoracolumbar region, yes.
Do Sympathetic nerve fibers penetrate the aortic arch?
No. The myocardium.
Does the sympathetic division secrete norepinephrine?
Yes, when stimulated the sympathetic postganglionic fibers release norepinepherine (20%) and epinepherine (80%).
Are nerve fibers in ascending tracts myelinated?
If I was paying attention in med school, I think... The pre-ganglionic fibers are myelinated and the post-ganglionic are unmyelinated. This is in reference to the sympathetic and parasympathetic systems.
What parts of the body receive only sympathetic fibers?
adrenal medulla, sweat glands, arrector pili muscles of the skin, kidneys, most blood vessels
Does sympathetic fibers originate in the spinal cord?
Thoracic and lumbar regions
Postganglionic fibers that innervate targets in the body wall or thoracic cavity originate on neurons within?
sympathetic chain ganglia
Do the sympathetic fibers leave the CNS at the thoracolumbar region?
All preganglionic sympathetic fibers leave the CNS at the thoracolumbar region, yes.
What fibers innervate sweat glands?
Sympathetic fibers innervate sweat glands.
What fibers are the sweat glands innervated by?
sympathetic
What fibers are located in the white rami?
Sympathetic preganglionic.
What secretes norepinephrine adrenergic fibers?
sympathetic division. Parasympathetic division fibers called cholinergic fibers release acetylcholine.
What releases catecholamines as a neurotransmitter?
it would be postganglionic sympathetic fibers
Do Sympathetic nerve fibers penetrate the aortic arch?
No. The myocardium.
Does the sympathetic division secrete norepinephrine?
Yes, when stimulated the sympathetic postganglionic fibers release norepinepherine (20%) and epinepherine (80%).
Where did natural plant fibers originate?
The plant
Is mydriasis parasympathetic or sympathetic?
the parasympathetic fibers of the cranial nerve number three.
