Term
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Definition
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Term
| peripheral nervous system |
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Definition
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Definition
| structures that regulate involuntary functions |
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| 2 cells of the nervous system |
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Definition
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Definition
| dendrites, cell body, axon |
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Definition
| conduct impulses to cell body of neuron |
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Definition
| conducts impulses away from cell body of neuron |
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Definition
| conduct impulses to the spinal cord and brain |
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Definition
| conduct impulses away from brain and spinal cord to muscles and glands |
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Definition
| conduct impulses from sensory neurons to motor neurons |
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Definition
| astrocytes, microglia, oligodendroglia |
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Definition
| star shaped cells that anchor small blood vessels to neurons |
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Definition
| small cells that move in inflamed brain tissue carrying on phagocytosis |
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Definition
| form myelin sheaths on axons in the CNS |
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Definition
| characterized by myelin loss in central nerve fibers and resulting conduction impairments |
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Term
| name for nervous system tumors |
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Definition
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Term
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Definition
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Term
| multiple neurofibromatosis |
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Definition
| characterized by numerous benign tumors that can progress to disfiguring, crippling soft tissue tumors |
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Definition
| bundle of peripheral axons |
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Definition
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| tissue composed primarily of myelinated axons |
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Definition
| tissue composed primarily of cell bodies and unmyelinated fibers |
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Term
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Definition
| fibrous connective tissue |
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Term
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Definition
| surrounds individual fibers within a nerve |
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Term
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Definition
| surrounds a group (fascicle) of nerve fibers |
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Definition
| surrounds the entire nerve |
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Term
| nerve impulses are conducted from receptors to effectors over neuron pathways also known as... |
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Definition
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Term
| conduction by a reflex arc results in a reflex such as... |
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Definition
| contraction of a muscle or secretion by a gland |
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Term
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Definition
| self propagating wave of electrical disturbance that travels along the surface of a neuron membrane |
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Term
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Definition
| a stimulus triggers the opening of Na+ channels in the plasma membrane of the neuron, inward mov't of Na+ leaves a slight excess of neg. ions outside at a stimulated point<-marks beginning of the impulse |
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Term
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Definition
| chemical compounds released from axon terminals into a synaptic cleft |
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Term
| neurotransmitters bind to specific receptor molecules in the membrane of a postsynaptic neuron, opening ion channels and thereby... |
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Definition
| stimulating impulse conduction by the membrane |
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Term
| names of neurotransmitters (2) |
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Definition
| acetylcholine and catecholamines (dopamine, serotonin) |
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Term
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Definition
| characterized by abnormally low levels of dopamine in motor control areas of the brain, patients usually exhibit involuntary trembling and muscle rigidity |
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