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32 Cards in this Set
- Front
- Back
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What type of neurons are involved? |
Visceral motor neurons- innervates smooth muscle, cardiac muscle and glands |
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What nerves do the parasympathetic system contain? |
Cranial and sacral nerves
Long preganglionic axons Short postganglionic axons |
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What nerves are in the sympathetic Division? |
Thoracic and lumbar nerves
Long post ganglionic neuron Short pre ganglionic neuron |
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Where are somatic motor cell bodies located? |
In the Anterior grey horn of the spinal cord |
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Where are visceral motor cell bodies located? |
Lateral grey horn of spinal cord |
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How many pathways do visceral motor fibers have in a pathway? |
2
Somatic motor only have 1 pathway |
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What division are smooth muscles innervated by? |
Sympathetic division |
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Are there cranial nerves in the sympathetic nervous systems? |
No. Only spinal nerves |
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What type of neurons do ganglions contain? |
Only sensory cell bodies (unipolar neurons) |
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What are rootlets? |
They branch directly off the spinal cord |
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Posterior rami |
Somatic innervation of POSTERIOR neck and back. (Skin, muscle tissue etc)
Covers less |
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Anterior rami |
Somatic innervation of lateral and anterior neck and trunk and limbs.
Covers more |
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What does the adrenal medulla do? |
Major organ in sympathetic nervous system.
Secretes norephenephrine and adrenaline during "fight or flight " |
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Adrenal medulla neurons? |
No body only processes |
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What do visceral sensory neurons do? |
Monitor stretch temperature chemical changes and irritation of visceral organs |
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Baroreceptors |
Visceral reflex that controls blood pressure |
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Hypothalamus |
Main integration center of ANS
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Brain stem |
Cardiac center, breathing center, Basic functions of ANS |
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Spinal cord |
reflex center |
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Where are somatic motor cell bodies located? |
Anterior grey horn |
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Where are the cell bodies of preganglionic Sympathetic neurons located? |
Lateral grey horn of spinal cord (T1-L2) |
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Is motor efferent or Afferent?
Are signals carried in or out? |
Efferent
Signal carried out |
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Are motor pathways ascending or descending? |
Descending |
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Are sensory pathways Afferent or efferent?
Are signals carried in or out? |
Afferent
Signals carried in |
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Are sensory pathways ascending or descending? |
Ascending |
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Where do sensory signals enter? Where are the cell bodies located? |
Through posterior (dorsal) root/ horn.
Dorsal root ganglia |
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Where are the cell bodies of the preganglionic Parasympathetic neurons located? |
In the gray matter of the brain stem |
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Where are the cell bodies of the preganglionic Parasympathetic neurons located? |
In the gray matter of the brain stem |
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Where do the preganglionic neuron and postganglionic neuron synapse? |
In the autonomic ganglion |
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What neurotransmitter is released by the parasympathetic postganglionic fibers? |
Acetylcholine |
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What neurotransmitter is released by most sympathetic postganglionic fibers? |
Norephinepherine |
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Where are the preganglionic cell bodies of the sympathetic nervous system located? |
Lateral horn of spinal cord |
