Answer:
Humans have a mixture of axons, myelinated and unmyelinated, large and small in diameter, to produce a range of responses. The rate at which these both types of axon respond may vary.
Step-by-step explanation:
Myelinated nerve fibers are insulated by a myelin sheath, whereas, unymyelinated nerve fibres do not have a myelin sheath. These axons are cellular extensions in neurons to transmit neuronal signals from one cell to another. the axons are different in length and diameter depending upon the distance they have to cover to reach their specific target cell. the myelination of axons increases the speed of electrical signals passing through them. the CNS and PNS neurons are myelinated but have different diameters as per the functioning of different neurons and range of electrical signals each neuron has to carry. the CNS myelinated axons has a diameter of greater than 0.2 μm and the PNS myelinated axons have the diameter of 1–2 μm. The unmyelinated neurons are slower and the electrical wave propagation in these axons is via saltatory conduction. The group C postganglionic fibers in ANS are unmyelinated and have slow electrical conduction.