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Nervous System


neuron a nerve cell
brain specialized group of nerve cells that controls and coordinates activities of the nervous system
CNS portion of nervous system that consists of brain and spinal cord
PNS subdivision of nervous system that contains nerves that bring information to CNS
autonomic nerves control heart rate, breathing, salivary production, etc
nerve impulse message that travels from dendrites of a neuron through the axon
axon nerve fiber that conducts message away from cell body
schwann cell cells that from myelin
node of ranvier gap in myelin that increases speed of impulse
synapse space between 2 neurons through which neurotransmitter traves
afferent nerve receives information from the environment
efferent nerve transmits to muscles or glands that will respond to impulses
stimulus something that causes a response
cell body contains cytoplasm and nucleus
myelin fat layer that surrounds and insulates axons



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