Matching 39.Match each structure with its best definition. Please write the correct answer by the letter or no credit will be given. A. axon i. the main body of a neuron, containing the nucleus and most of the cell's organelles ii. the long extension of a neuron through which an action potential travels to transmit a signal iii, a gap into which neurotransmitters are released to transmit chemical signals from one cell to another iv. a finely branched extension from a neuron that picks up incoming impulses v. an insulated covering produced by oligodendrites or Schwann cells that speeds the conduction of nervous impulses B. dendrites C. myelin sheath D. soma E. synapse