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Does parasympathetic have postganglionic axons secrete norepinephrine?
no, not all postganglionic sympathetic fibre neuron secrete NE
Does the sympathetic division secrete norepinephrine?
Yes, when stimulated the sympathetic postganglionic fibers release norepinepherine (20%) and epinepherine (80%).
Are axons most located and protected within the CNS?
axons
Is the adrenal medulla a misplaced sympathetic ganglion?
The adrenal medulla has many similarities with post-ganglionic sympathetic neurons, they release catecholamine because medullary cells are derived from the neural crest and, as such, are simply modified neurons. The adrenal gland releases epinephrine, norepinephrine and dopamine in response to neural not hormonal signals just like postganglionic neurons. The most significant different between adrenal medulla cells and true postganglionic sympathetic neurons is the absence of axons. The neurotrasmitter has become a hormone and is released into the blood.
What sympathetic ganglion distributes postganglionic neuronal processes to the kidneys?
aorticorenal ganglion
Does parasympathetic have postganglionic axons secrete norepinephrine?
no, not all postganglionic sympathetic fibre neuron secrete NE
Postganglionic axons secrete acetylcholine cholinergic fibers?
Parasympathetic
Which organ consists of modified postganglionic neurons without dendrities or axons?
Adrenal Glands
Does the sympathetic division secrete norepinephrine?
Yes, when stimulated the sympathetic postganglionic fibers release norepinepherine (20%) and epinepherine (80%).
How many efferent neurons are used in a somatic action potential?
The autonomic reflex contains two. (preganglionic and postganglionic)
Compare between sympathetic and parasympathetic in reflex arc?
In parasympathetic reflex arc the preganglionic nerve fibre is longer than post ganglionic fibre, that is the synapse occur near the organ or tissue. While in sympathetic reflex arc both the pre and post have moderate sizes. The postganglionic fibre of parasympathetic always secrete acetylcholine as nuerotransmitter while postganglionic fibre of sympatheic reflex arc mostly secrete norepinephrine or epinephrine as nuerotransmitter. Some nerve fibres may secrete acetylcholine. For example postganglionic sympatehtic nerve fibres of sweat glands, pilorectal muscles and few blood vessels
Do all visceral motor neurons synapse in a sympathetic ganglion?
No; some axons synapse in nearby autonomic ganglion. postganglionic fibers travel along either sympathetic nerves or rejoin at the spinal nerve.
The postganglionic sympathetic fiber originates from?
The postganglionic sympathetic fiber originates from PNS within a ganglion
Are axons most located and protected within the CNS?
axons
What has short unmyelinated postganglionic fibers?
parasynpathetic system
Which division of the autonomic nervous system is characterized by short preganglionic and long postganglionic fibers?
The parasympathetic nervous system has long preganglionic and short postganglionic fibers
Is the adrenal medulla a misplaced sympathetic ganglion?
The adrenal medulla has many similarities with post-ganglionic sympathetic neurons, they release catecholamine because medullary cells are derived from the neural crest and, as such, are simply modified neurons. The adrenal gland releases epinephrine, norepinephrine and dopamine in response to neural not hormonal signals just like postganglionic neurons. The most significant different between adrenal medulla cells and true postganglionic sympathetic neurons is the absence of axons. The neurotrasmitter has become a hormone and is released into the blood.
