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- extensions of the cytoplasm
- are generally multiple
- provide increased surface area (dendritic zone) to allow for synaptic interaction |
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- neuromuscular junctions autonomic nervous system and brain
- excites muscles, decreases heart rate, and relays various signals in the autonomic nervous system and the brain |
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- sympathetic nervous system and brain
- regulates activity of visceral organs and some brain functions |
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- brain
- involved in control of certain motor functions |
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- brain and spinal cord
- may be involved in mental functions, circadian rhythms, and sleep and wakefulness |
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- brain and spinal cord
- inhibits various neurons |
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- spinal cord
- inhibits various neurons |
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| - cluster of neuron cell bodies outside the central nervous system |
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| - layered arrangement of neuron cell bodies on the surface of the cerebrum and cerebellum |
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| - surround the axons and form the myelin sheath of peripheral nervous system axons |
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| Sympathetic Nervous System |
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| Parasympathetic Nervous System |
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| Somatic Peripheral Nervous System |
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| - surround cell bodies in the ganglia of the peripheral nervous system |
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- fibrous and protoplasmic; their perivascular feet end on capillairies
- located between capillary and neurons and implicated in the blood-brain barrier
- 80% of brain capillary surface are covered with these |
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Definition
| - function in the myelinization of the central nervous system axons |
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| - the phagocytic macrophage-lie cells of the central nervous |
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