The neuron is the functional unit of the nervous system

Question Number 4289Question:
The neuron is the functional unit of the nervous system. Humans have about 100 billion neurons in their brain alone! Messages are transported along a neuron via an action potential. This is brought about by
a) An opening of the sodium and potassium channels
b) A closure of the sodium and potassium channels
c) Pumping positive ions from inside the membrane to the outside
d) Releasing neurotransmitters
e) A general reaction to adrenaline release


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