The speed at which a neural impulse travels is increased when the axon is encased by a(n)
A) endorphin.
B) myelin sheath.
C) glial cell.
D) synaptic vesicle.

Question

Quizplus · Accepted Answer

The myelin sheath is a layer of fatty tissue that encases the axon of some neurons. This sheath helps to increase the speed at which the neural impulse travels by allowing the impulse to jump from one node of Ranvier to the next, rather than traveling the length of the entire axon.

The Speed at Which a Neural Impulse Travels Is Increased