Which cell is found in the nervous system?
a.)sodium
b.)axon
c.)neuron
d.)dendrite

when an action potential reaches the end of the axon, what happens?
a.)the sodium ions travel back toward the dendrites.
b.)the neuron takes up chemical messengers (neurotransmitters).
c.)the potassium ions travel back toward the cell body.
d.)the neuron releases chemical messengers (neurotransmitters).