Which factor(s)impede the regeneration of CNS axons?
A)Oligodendrocytes do not release a nerve growth factor.
B)CNS axons lack the myelin sheath needed for regeneration.
C)Scar tissue may form,obstructing regrowth.
D)All of the choices are correct.
E)Two of the choices are correct.

Question

Quizplus · Accepted Answer

Scar tissue in the CNS can form after injury, which can obstruct the regrowth of axons. Additionally, oligodendrocytes, the myelin-forming cells in the CNS, do not release nerve growth factors needed for axon regeneration. Therefore, both options C and A are correct, making option E the best choice. CNS axons do have the potential to regenerate, but the presence of scar tissue and lack of nerve growth factors make the process more challenging than in the peripheral nervous system. The statement in option B is incorrect, as CNS axons do have myelin sheaths.

Which Factor(s)impede the Regeneration of CNS Axons