One reason why axons regenerate better in the peripheral nervous system of mammals than in the central nervous system is that the peripheral nervous system:
A) has fewer myelinated axons.
B) has glial cells that destroy scar tissue.
C) maintains a temperature closer to that at which embryonic cells form.
D) produces a chemical that promotes axon growth.

Question

Quizplus · Accepted Answer

The peripheral nervous system produces a chemical that promotes axon growth called nerve growth factor (NGF). This is not present in the central nervous system, which may explain why axons regenerate better in the peripheral nervous system.

One Reason Why Axons Regenerate Better in the Peripheral Nervous