Term
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Definition
| nerve cell that conducts impulses |
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Term
| sensory neuron (afferent neuron) |
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Definition
| carries impulses to the central nervous system |
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Term
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Definition
| carries impulses within the central nervous system |
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| motor neuron (efferent neuron) |
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Definition
| carries impulses from the central nervous system to effectors |
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Term
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Definition
| projection of cytoplasm that carries impulses toward the cell body |
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Term
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Definition
| extension of cytoplasm that carries nerve impulses away from cell body |
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Term
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Definition
| covering over the axon of a nerve cell that is composed of Schwann cells and insulates the axon |
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Definition
| regularly occurring gaps between sections of myelin sheath that speed transmission of nerve impulses |
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Term
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Definition
| delicate membrane surrounding the axons o some nerve cells that promotes nerve regeneration |
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Term
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Definition
| neural circuit that travels through the spinal cord, provides a framework for a reflex action |
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Term
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Definition
| nonconducting cells important for the structural support and metabolism of the nerve cells |
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Term
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Definition
| clusters in which cell bodies of sensory neurons are located outside the spinal cord |
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Term
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Definition
| protective membranes that surround the brain and spinal cord |
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Term
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Definition
| circulates between the innermost and middle membranes of the brain and spinal cord, acts as a transport medium and shock absorber |
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Term
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Definition
| the largest and most highly developed part of the human brain, stores sensory information and initiates voluntary motor activities |
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Term
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Definition
| the outer layer of the cerebral hemispheres |
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Term
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Definition
| a nerve tract that allows communication between the two cerebral hemispheres |
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Term
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Definition
| the region of the brain that coordinates muscle movement |
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Definition
| maintains the body's internal equilibrium |
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Term
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Definition
| the region of the brain that acts as a relay station by sending nerve messages between the cerebellum and the medulla |
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Term
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Definition
| the hindbrain region that joins the spinal cord to the cerebellum, the site of autonomic nerve control |
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