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What synapses release acetylcholine?
sympathetic preganglionic axon parasympathetic preganglionic axon parasympathetic postganglionic axon
What fibers are located in the white rami?
Sympathetic preganglionic.
Which division of the nervous system has short preganglionic neurons?
sympathetic
Does sympathetic or parasympathetic stimulation produce thicker saliva with more mucus?
Sympathetic. Parasympathetic secretes thin saliva rich in amylase.
Is The neurotransmitter released by both sympathetic and parasympathetic preganglionic neurons is acetylcholine.?
Yes, the neurotransmitter released by both sympathetic and parasympathetic preganglionic neurons is acetylcholine. In the autonomic nervous system, preganglionic neurons from both divisions release acetylcholine to activate nicotinic receptors on postganglionic neurons. This is a key feature that differentiates the preganglionic fibers from the postganglionic fibers, where the sympathetic fibers typically release norepinephrine and the parasympathetic fibers release acetylcholine.
Which endocrine gland is directly innervated by sympathetic preganglionic axons?
pituitary gland
Is white rami exclusive to the sympathetic division of the ANS?
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 sympathetic fibers trigger the release of?
Preganglionic sympathetic fibers trigger the release of acetylcholine at the synapse with postganglionic neurons in the sympathetic ganglia. This neurotransmitter binds to nicotinic acetylcholine receptors on the postganglionic neuron, which then propagate the signal to release norepinephrine at the target tissue.
Is short preganglionic axons parasympathetic or sympathetic?
Short preganglionic axons are characteristic of the sympathetic nervous system. In the sympathetic division, these axons originate in the spinal cord and project to nearby ganglia, which are typically located close to the spinal cord. In contrast, the parasympathetic nervous system features long preganglionic axons that extend from the brainstem or sacral spinal cord to ganglia located near or within target organs.
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
Sympathetic nerves may leave the spinal cord at which vertebra?
Preganglionic sympathetic axons leave the spinal cord throughout the thoracic spine and the upper lumber spine (T1-L2).These preganglionic sympathetic axons exit the spinal canal within the anterior primary ramus and then quickly separate to travel via the white ramus communicans to the ipsilateral sympathetic trunk.
What will sympathetic stimulation of the eye do?
Sympathetic stimulation of the eye will cause dilation of the pupil (mydriasis) and relaxation of the ciliary muscle for far vision.
