Term
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Definition
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Term
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Definition
| The electrochemical process of depolarization and repolarization along an axon. |
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Definition
| Portion of nerve cell that includes a cytoplasmic mass and a nucleus, and from which nerve fibers extend. |
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Definition
| Process of a neuron that receives input from other neurons. |
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Definition
| A nerve fiber. It conducts a nerve impulse away from the neuron cell body. |
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Definition
| A bundle of axons in the peripheral nervous system. |
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Definition
| Specialized cells of the nervous system that produce myelin, communicate between cells, and maintain the ionic environment. |
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Term
| Central Nervous System (CNS) |
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Definition
| The brain and spinal chord. |
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Term
| Peripheral Nervous System (PNS) |
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Definition
| The portions of the nervous system outside the central nervous system. |
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Definition
| A specialized structure associated with the peripheral end of a sensory neuron specific to detecting a particular sensation and triggering a nerve impulse in response, which is transmitted to the central nervous system. |
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Definition
| A muscle or gland that effects change in the body. |
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Definition
| Motor pathways of the peripheral nervous system that lead to the skin and skeletal muscles. |
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Definition
| Portion of nervous system that controls the viscera. |
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Definition
| Fatty material that forms a sheathlike covering around some axons. |
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Definition
| A neuroglial cell that supports neurons and phagocytizes. |
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Definition
| A type of neuroglial cell that forms myelin. |
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Definition
| A type of neuroglial cell that connects neurons to blood vessels. |
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Definition
| A membrane composed of neuroglial cells that lines the ventricles of the brain. |
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Definition
| A type of neuroglial cell that surrounds an axon of a peripheral neuron, forming the neurilemmal sheath and myelin. |
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Term
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Definition
| A fine, cytoplasmic thread that extends from the cell body into the process of a neuron. |
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Definition
| The part of a neuron that connects the cell body to the axon. |
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Definition
| Sheath formed from Schwann cells on the outside of some axons. |
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Definition
| Small gaps between Schwann cells. |
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Term
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Definition
| Nerve fibers that are covered by a myelin sheath. |
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Term
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Definition
| Nerve fibers that are not covered with a myelin sheath. |
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Definition
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Definition
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Term
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Definition
| A sensitive part of an axon where a nerve impulse originates. |
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Term
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Definition
| Have many nerve fibers arising from their cell bodies, only one process of each neuron is an axon; the rest are dendrites (found in brain/spinal chord). |
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Term
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Definition
| Have a single axon and a single dendrite extending from opposite sides of the cell body (found in eyes, nose, and ears). |
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Term
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Definition
| Have a single process extending from the cell body which is an axon (found in ganglia outside of CNS). |
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Term
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Definition
| Specialized masses of nervous tissue. |
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Term
| Sensory Neuron (Afferent) |
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Definition
| A neuron that transmits an impulse from a receptor to the central nervous system. |
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Term
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Definition
| A neuron between a sensory neuron and a motor neuron; internuncial or association neuron. |
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Term
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Definition
| Masses of interneuron cell bodies in the central nervous system. |
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Term
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Definition
| A neuron that transmits impulses from the central nervous system to an effector. |
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