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15 Cards in this Set

  • Front
  • Back
Central Neverous System
mkes up the brain and spinal cord
Peripheral Nervous System
Sensory and motor nerons is part of this system
Nerve
consists of one or mome bundles of neuron fibers surrounded by three main functions
Sensory neurons
carry information about stimuli to the CNS.
sensory receptors
stimuli recieves specialized cell that transmits signals to sesnory neurons
motor neurons
carry signals away from the CNS
reflex
automatic response
dendrite
neuron fiber that receives signals and carries them toward the cell body
axon
neuron fiber that carries electric impulses away from the cell body and toward other cells
resting potential
polariized, a voltage across the plasma membrane of a resting neuron
threshold
minimum change in a membrane's voltage that must occur to generate an action potential
action potential
nerve impulse, depolarized
synapse
junction betweena terminal and next dendrite
neurotransmitter
chemical messenger that carries information from one neuron to another or to another cell
somatic
subdivision of the motor division of the peripheral nervous system that controls the voluntary movement of skeletal muscles