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21 Cards in this Set
- Front
- Back
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Where are the cell body and synapse for the preganglionic neuron?
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cell body - CNS
synapse- autonomic ganglia |
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Where are the cell body and synapse for the postganglionic neuron?
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cell body - autonomic ganglia
synapse - target organ |
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Describe parasympathetic preganglionic neurons?
where are their cell bodies and synapses? length of projections? |
cell bodies - cranial and sacral regions of spinal cord
synapses - parasympathetic ganglia (in or near target organ) long projections |
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Describe parasympathetic postganglionic neurons?
where are their cell bodies and synapses? length of projections? |
cell bodies - in parasympathetic ganglia
synapse - on target organ short axonal projections |
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Describe sympathetic preganglionic neurons?
where are their cell bodies and synapses? |
cell bodies - thoraco-lumbar region of spinal cord
synapse - paravertabral sympathetic chain |
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Describe sympathetic postganglionic neurons?
where are their cell bodies and synapses? |
cellbodies - sympathetic chain
synapse- target organ long axonal projections |
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Sympathetic effect on heart?
SA node? AV node? atrial muscle? ventricular muscle? what receptor? |
SA - increase rate
AV - increase automaticity Atrial muscle - increase force Ventricular muscle - increase force & automaticity Adrenegic beta 1 |
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Parasympathetic effect on heart?
SA node? AV node? atrial muscle? ventricular muscle? what receptor? |
SA - decrease rate
AV - decrease conduction velocity, AV block Atrial muscle - decrease force Ventricular muscle - no effect Cholinergic M2 |
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Sympathetic effect on arterioles?
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constriction (alpha adrenegic)
except to muscle - dilation (adrenegic beta2) |
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Parasympathetic effect of arterioles?
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no effect except on erectile tissue and salivary gland - dialation (cholinergic M3)
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Sympathetic effect on veins
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constriction - alpha
dilation - beta2 |
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Parasympathetic efect of veins?
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no effect
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Sympathetic effect on eye (pupil and cilary muscle)?
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pupil - dialte alpha
cilary muscle relaxs (slightly) beta |
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parasympathetic effect on eye (pupil and cilary muscle)?
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constriction M3
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sympathetic and parasympathetic effect on salivary gland?
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symp - increase secreation alpha1, beta
parasymp - increased secreation, M3 |
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what neurons release Ach?
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All autonomic preganglionic neurons and postganglionic parasympathetic neurons (cholinergic transmission)
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what neurons realese noradrenaline (NA)?
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Most postganglionic sympathetic neurons (adrenic transmission)
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homotropic transmitter release?
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transmitter release dfrom neuron inhibits further release from same neuron
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heterotropic transmitter release?
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transmitter from a neuron inhibits release of a diffrent transmitter from a diffrent neuron
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name 5 non-peptide and 4 peptide NANC transmitters?
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non-peptide - ATP, NO, dopamine, GABA, 5-HT
peptide - NPY, VIP, GnRH, Substance P |
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What can co-transmitters do? (3)
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1. increase the action of a transmitter
2. mediate a different phase of response 3. indirectly increase the action of a neuro transmitter |
