The answer to this question would be <span>insulation.
Myelin is a cell that will envelop a neuron axon so it will have some insulation in many parts of their membrane. This insulation will help membrane potential to travel faster. Fast neuron fiber always be the one with sheath. Losing myelin will cause the signal transmission is impaired.</span>
The answer is true, all of this nutrients are essential
The digestive system is responsible for breaking down foods and turning them into nutrients and energy.
Hope helps!-Aparri