epinepherine and norepinephrine
D. vagus. this is the largest Cranial nerve, carrying parasympathetic information to much of the body (ie. esophagus, GI tract, heart). parasympathetic fibers, unlike sympathetic fibers, do not synapse until they are pretty much on in or near the organ. So the vagus is made up of preganglionic parasympathetics.trigeminal contains somatic afferents, and somatic efferents. neither of these are visceral efferents (which could be para or sympathetic).wikipedia tells you correctly that splanchnic nerves are generally sympathetic autonomics, except for one spot.optic nerve is carrying Afferent sensory information Away from the eye.
They are called splanchnic nerves. These nerves carry preganglionic fibers to the collateral ganglia where they synapse with postganglionic neurons.
Sweat glands are innervated by adrenergic sympathetic nerve fibers from the autonomic nervous system. These fibers release norepinephrine, which stimulates the sweat glands to produce sweat.
Norepinephrine is mainly secreted by the adrenal medulla and the postganglionic fibers of the sympathetic nervous system, which are also known as adrenergic fibers. These fibers release norepinephrine in response to stress or arousal, helping to initiate the body's fight or flight response.
No, most blood vessels are innervated by both sympathetic and parasympathetic nerve fibers. However, sympathetic nerve fibers typically have a more pronounced effect on blood vessel activity compared to parasympathetic fibers.
Sympathetic preganglionic.
The parasympathetic nervous system has long preganglionic and short postganglionic fibers
Preganglionic because they are myelinated. FALSE
No, white rami are not exclusive to the sympathetic division of the autonomic nervous system (ANS). While they are primarily associated with the sympathetic division, specifically as pathways for preganglionic sympathetic fibers to enter the sympathetic ganglia, similar structures exist in the parasympathetic division. However, the term "white rami" typically refers to the myelinated preganglionic fibers of the sympathetic system.
Preganglionic fibers for the SNS release ACh; so a drug that stimulates ACh receptors would stimulate the postganglionic fibers of sypathetic nerves, resulting in increased sympathetic activity
preganglionic sympathetic fibers releasing acetylcholine that bind to receptors on the adrenal medulla
Yes, sympathetic fibers leave the central nervous system at the thoracolumbar region, specifically from the intermediolateral cell column of the spinal cord. These fibers then form the sympathetic trunk and travel to the target organs to regulate the body's fight-or-flight response.
Yes and No. White communicating rami contain mylinated preganglionic sympathetic nerve fibers, but are only present at the levels of spinal cord segments T1-L2 (where the cell bodies for these nerve fibers exist in the lateral horn of the spinal cord). Although the sympathetic fibers only arise in the T1-L2 spinal cord segments, they are dispersed to all spinal nerves by traveling through the sympathetic chain. The preganglionic sympathetic fibers will enter the sympathetic chain thru whit rami communicans and then do one of 4 things: 1. synapse with a postganglionic cell body in the sympathetic chain at the level it enters 2. ascend within the chain to synapse 3. descend within the chain to synapse 4. splanchnic nerves leave the chain without synapsing and synapse closer to the organ they innervate.There are, however, GRAY rami communicans for all spinal nerves.I hope that helps
D. vagus. this is the largest Cranial nerve, carrying parasympathetic information to much of the body (ie. esophagus, GI tract, heart). parasympathetic fibers, unlike sympathetic fibers, do not synapse until they are pretty much on in or near the organ. So the vagus is made up of preganglionic parasympathetics.trigeminal contains somatic afferents, and somatic efferents. neither of these are visceral efferents (which could be para or sympathetic).wikipedia tells you correctly that splanchnic nerves are generally sympathetic autonomics, except for one spot.optic nerve is carrying Afferent sensory information Away from the eye.
could be preganglionic
They are called splanchnic nerves. These nerves carry preganglionic fibers to the collateral ganglia where they synapse with postganglionic neurons.
yes