In PNS nerve fiber regeneration,how is a growing axon directed to its original destination?
A) It grows within a regeneration tube.
B) The axonal terminals grow towards the neurosoma until the two severed fragments are reunited.
C) The axon grows a collateral that is directed by growth factors secreted by the postsynaptic neuron.
D) Injured Schwann cells produce a trail of prostaglandins to the original destination.

Question

Quizplus · Accepted Answer

In PNS nerve fiber regeneration, a growing axon is directed to its original destination by growing within a regeneration tube. The tube, which is formed by Schwann cells, provides a pathway for the axon to grow towards its target. The tube also produces growth factors that attract the axon and promote its growth. Once the axon reaches its original destination, it can form new synapses and restore function to the affected area.

In PNS Nerve Fiber Regeneration,how Is a Growing Axon Directed