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18 terms

nervous system

nervous system
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action potential
the local voltage change across the cell wall as a nerve impulse is transmitted
autonomic nervous system
the part of the nervous system of vertebrates that controls involuntary actions of the smooth muscles and heart and glands
cerebrospinal fluid
clear liquid produced in the ventricles of the brain
ganglion
collection of nerve cell bodies in the peripheral nervous system
limbic system
a system of functionally related neural structures in the brain that are involved in emotional behavior
membrane potential
The voltage difference across a membrane
meninges
a membrane (one of 3) that envelops the brain and spinal cord
myelin
a fatty substance that helps insulate neurons and speeds the transmission of nerve impulses
neuroglia
non-conducting cells of nervous tissue with supportive and metabolic functions
parasympathetic division
part of autonomic nervous system that controls rest and digestion
reflex
an automatic instinctive unlearned reaction to a stimulus
somatic nervous system
the division of the peripheral nervous system that controls the body's skeletal muscles
spinal nerves
31 pairs of nerves arising from the spinal cord
sympathetic division
the part of the autonomic nervous system that arouses the body to deal with perceived threats
synapse
the junction between two neurons (axon-to-dendrite) or between a neuron and a muscle
neuron
a cell that is specialized to conduct nerve impulses
dendrite
short fiber that conducts toward the cell body of the neuron
synaptic terminal
A bulb at the end of an axon in which neurotransmitter molecules are stored and released