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 soma 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

A growing axon in PNS nerve fiber regeneration is directed to its original destination by growing within a regeneration tube. The regeneration tube is formed by Schwann cells and extracellular matrix components, which guide the axon towards its target. The tube provides a continuous path for the axon to grow along, preventing it from disorienting or branching off in the wrong direction. The regeneration tube also secretes growth factors that promote axonal growth and survival.

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