In the Peripheral Nervous System, Schwann Cells Participate in the Repair

Question

In the peripheral nervous system, Schwann cells participate in the repair of damaged nerves by
A) producing new axons.
B) regenerating cell bodies for the neurons.
C) forming a cellular cord that directs axonal regrowth.
D) clearing away cellular debris.
E) producing more satellite cells that fuse to form new axons.

Accepted Answer

Schwann cells play a critical role in peripheral nerve repair by forming a cellular cord that directs axonal regrowth. This cord, called the Bands of Bungner, guides and supports the regrowth of injured axons. In addition, Schwann cells clear away cellular debris and produce growth factors that promote axonal regeneration. However, they do not produce new axons, regenerate cell bodies or produce more satellite cells.