What is one impediment to the regeneration of axons in the mammalian central nervous system?
A) Inhibitory chemicals secreted by the damaged portion of the axon
B) Bacterial infections caused by the decaying tissue
C) Glia releasing chemicals that inhibit axon growth
D) Inhibitory messages sent from the cell nucleus when an axon is damaged

Question

Quizplus · Accepted Answer

Glia cells in the central nervous system release chemicals that inhibit axon growth, which is an impediment to axon regeneration. This is one of the major reasons why axons in the mammalian central nervous system do not readily regenerate after injury. A number of inhibitory molecules have been identified that are produced by glia in response to injury, including various forms of chondroitin sulfate proteoglycans, myelin-associated glycoprotein, and the protein Nogo. These molecules act to restrict axon growth and prevent regeneration.

What Is One Impediment to the Regeneration of Axons in the Mammalian