What is the function of the myelin sheath on a nerve fiber?
A) It acts as insulation to keep heat in.
B) It acts as insulation to speed signal transmission.
C) It acts as insulation to maintain separation between the negative and positively charged ions.
D) It acts as a pathway for neurotransmitters to get to the neuron membrane.
E) It keeps the neurotransmitters traveling lengthwise along the cells, rather than crossing into them from the side.
Correct Answer:
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