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15 Cards in this Set
- Front
- Back
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Which 3 things does the autonomic nervous system regulate? |
Activity of smooth muscle, cardiac muscle and glands |
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The term used for the branch of the ANS that stimulates the organ to increase activity and the term the branch that decreases the organ's activity. |
Excitation and Inhibition |
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What are the 3 branches of the autonomic nervous system? |
Sympathetic, Parasympathetic, Enteric |
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The system that enhances "rest and digest" activities |
Parasympathetic |
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The system the promotes "fight or flight" response. |
Sympathetic |
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The system the governs the contraction in the GI tract and operates involuntarily. |
Enteric |
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What are the 2 motor nerons in series for most of the autonomic motor pathways? |
Preganglionic & Postganglionic |
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The neuron that has its cell body in the CNS and the axon extends to an autonomic ganglion. Action potentials from CNS to autonomic ganglia. |
Preganglionic |
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Describe the postganlionic neuron. |
The neuron that has its unmyelinated axon extending from the ganglion to the effector and lies entirely in the PNS. Action potentials from autonomic ganglia to visceral effectors. |
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In the sympathetic division, cell bodies of the sympathetic preganglionic neurons are part of the _________ ______ horns in the ___ __________ and first ______ ___________ segments. |
lateral gray 12 thoracic 2 or 3 lumbar |
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In the parasympathetic division, cell bodies of the preganglionic neurons are in the ___________________________ (III, VII, IX, and X) in the ______________ and in the ___________________ of the ________________ _____ of the spinal cord. |
nuclei of 4 cranial nerves brain stem lateral gray matter sacral segments 2-4 |
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Label the autonomic pathway to the adrenal medulla. |
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What happens at a neuroeffector junction and where is it located? |
The site where autonomic postgang. neuron communicates with a visceral effector. Located at varicosities. |
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How does the neuroeffector junction differ from neuron to neuron synapse? |
1) Instead of synaptic end bulbs -> Varicosity - Swollen regions containing synaptic vesicles with a neurotransmitter. 2) neurotransmitters are not confined -> located at the surface of the cell |
