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Nervous System ANAT

QuestionAnswer
2 divisions of the nervous system Central and Periphereal Nervous System
what does the CNS (central nervous system) consist of brain and spinal cord
3 parts of a neuron dendrites - axon - cell body
2 branches of the peripheral nervous system (PNS) somatic and autonomic
arm-like extensions of the neuron which receive the initial nerve impulse and conducts the impulse into the cell body of the neuron. dendrite
part of the neuron which transmits impulses away from the cell body axon
part of the neuron which contains the nucleus and conducts the nerve impulse toward the axon cell body
autoimmune condition where the myelin sheaths of a myelinated axon degenerate resulting in the gradual loss of motor function multiple sclerosis
white fatty substance that surrounds axon to provide insulation and nutrients - allows nerve impulses to skip down the axon for much faster transmission myelin
the spaces or nodes between the myelinated sheaths on an axon which allow for saltatory conduction nodes of Ranvier
found strictly in PNS - the outer membrane of a Schwann cell - purpose is to regenerate damaged neuron neurilemma
type of nerve conduction that skips down the axon of a neuron via the Nodes of Ranvier in between patches of myelin, thereby speeding up nerve conduction saltatory conduction
nerve tissue consisting of myelinated axons and therefore designed for speed. Controls automatic functions such as breathing, heart rate, and blood pressure. white matter
nerve tissue consisting of unmyelinated axons and designed for processing information. Controls the senses such as hearing, vision, smell, touch, as well as memory and speech. gray matter
Created by: boakes
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