In adolescence the growth of the fatty tissue that forms around axons and speeds neurotransmission, enables better communication with other brain regions.

The answer to this question would be myelin.

Myelin cells are forming a sheath around the axon of a neuron. This sheath will limit the area where ion exchange happens so that is only able to happen every a certain distance. This causes the electrical signal move more quickly than it used to be.

Explanation:

One of the main reasons experts advise against traveling to Zika risk areas is because of birth defects of babies born from infected parents and lack of treatment. Vaccines are in the works, but there is still no cure for Zika, however, doctors can help treat the symptoms of it.

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