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14 Cards in this Set

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NEURON
NERVE CELLS; BASIC UNIT OF THE NERVOUS SYSTEM
SOMA
CELL BODY, STORES ENERGY FOR CELL
DENDRITE
RECEIVES MESSAGES FROM OTHER NEURONS AND CONDUCTS THE MESSAGES TOWARD THE SOMA
AXON
SENDS MESSAGES TO OTHER NEURONS
TERMINAL BRANCHES (AXON TERMINALS)
end of axon that contains neurotransmitters
Myelin sheath
helps increase the speed at which information can travel on the neurons. If you could look at a neuron you would see the sheath covering the axon of the neuron in a way that looks like a row of sausage links.
gilal cell
creates myelin, supports and guides neurons and helps repair neurons
synapse
small gap between neurons where information is exchanged
synaptic vesicles
places were NT's are stored until release into the synapse
Neurotransmitters
chemicals that stimulate neurons so they can communicate
excitatory
makes neurons more likely to fire
inhibitory
makes neurons less likely to fire
excitation threshold
the voltage difference necessary to destabilize a neuron, causing an action potential to occur
action potential (nerve impulse)
the brief change in electrical charge that destabilizes a neuron. the action potential stimulates the axon terminals, restarting the process