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14 Cards in this Set
- Front
- Back
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Compare and contrast the SOMATIC nervous system and AUTONOMIC nervous system |
Somatic: - Effector is skeletal muscle. - Controls all concious and unconcious movements of skeletal muscle. -Skeletal muscle contacts. - One neuron extends from the CNS to skeletal muscle. - Neuron cell bodies are in motor nuclei of the cranial nerves and in the ventral horn of the spinal cord. - One synapse - Myelinated - ACh neurotransmitter - Receptor molecules for ACh are nicotinic Autonomic: - Effector is glands, smooth muscle, cardiac muscle. - Controls unconscious regulation - Target tissues are stimulated or inhibited - Two neurons, preganglionic neuron to autonomic ganglion and postganglionic to target tissue. - Preganglionic neuron cell bodies are in autonomic nuclei of the cranial nerves and lateral part of the spinal cord. Postganglionic neuron cell bodies are in autonomic ganglia. - Two synapses (autonomic ganglia and target tissue) - Preganglionic axons are myelinated and postganglionic axons are unmyelinated. - ACh neurotransmitter in preganglionic neurons and ACh & NE in postganglionic neurons. - In autonomic ganglia, receptor molecules for ACh arw nicotinic, and in target tissues are muscarinic (either NE or alpha, beta adrenergic. |
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The white ramus contains... |
Preganglionic sympathetic fibers |
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The cell bodies of the postganglionic neurons of the sympathetic division are located in the ... |
Sympathetic chain ganglia and Collateral ganglia |
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Splaninic nerves... |
Have preganglionic neurons that synapse in the collateral ganglia |
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The parasympathetic division... |
- is also called the craniosacral divison - has preganglionic axons in the cranial nerves - has preganglionic axons in pelvic splaninic nerves - has ganglia near or in the wall of effectors |
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Sympathetic axons reach organs through all of the following except... |
Pelvic splaninic nerves |
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Which cranial nerves does NOT contain parasympathetic fibers? |
V- trigeminal |
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Which is expected if the sympathetic division is activated? |
- air passageways dilate |
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Which is true of the preganglionic neurons of the ANS? |
- all parasympathetic preganglionic neurons secrete ACh |
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When ACh binds to nicotinic receptors.. . |
- Na+ channels open |
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Nicotinic receptors are located in ... |
- postganglionic neurons of the parasympathetic division - postganglionic neurons of the sympathetic division - membranes of skeletal muscle |
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The sympathetic division... |
- generally opposes the actions of the parasympathetic division |
