Many axons, especially the larger ones, are insulated by a surrounding layer of fatty material called the _______________.
A) neuromodulator
B) myelin sheath
C) dendrite
D) glia

Question

Quizplus · Accepted Answer

The myelin sheath is a fatty material that surrounds many axons, especially the larger ones. This insulation allows for faster transmission of signals along the axon. A neuromodulator is a type of chemical messenger that can alter the activity of neurons but does not typically provide insulation. Dendrites are the branching extensions of neurons that receive signals from other neurons. Glia are non-neuronal cells that provide support and insulation for neurons, but they do not typically form the myelin sheath around axons.

Many Axons, Especially the Larger Ones, Are Insulated by a Surrounding