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14 Cards in this Set
- Front
- Back
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What are the two principal cell populations that make up nervous tissue?
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Neurons and Supporting Cells (also called neuroglia or glial cells)
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What makes up the Central Nervous System (CNS)?
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Brain and Spinal Cord
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What does the Peripheral Nervous System (PNS) include?
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The neural structures outside the CNS are included in this.
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What is the function of Neurons?
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They transmit messges (nerve impulses from one part of the body to another.
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What structural features do different types of neurons have in common?
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Cell body, processes or fibers
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Where would neuron cell bodies be found?
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In the CNS in clusters called nuclei, and in ganglia (clusters of neuron cell bodies outside the CNS).
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What makes up the gray matter of the nervous system?
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Neuron cell bodies make this up (due to the dark colored RNA).
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What forms tracts of white matter through the CNS?
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Neuron processes (axons)
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What forms peripheral nerves of the PNS?
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Neuron processes
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Neurofibrils
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Cytoskeletal elements of the neuron found in the cytoplasm. Their function is support and intracellular transport. They contain Nissl bodies.
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Nissl Bodies
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An elaborate Rough Endoplasmic Reticulum found in neurofibrils.
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Dendrites
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Neuron processes that conduct electrical currents toward the cell body (afferent).
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Axons
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neuron processes that carry impulses away from the nerve cell body (efferent).
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How many axons does a neuron have? How many dendrites?
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One axon per neuron, but a neuron may have many dendrites (depending on the type of neuron).
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