Wallerian degeneration involves the breakdown of
A. the segments of axon and myelin sheath between the site of damage and the cell body.
B. macrophages and microglia that have completed the job of CNS cleanup after trauma.
C. the neurilemma both central and peripheral to the site of trauma.
D. the segments of axon and myelin sheath between the site of damage and the peripheral effector.
Answer: D
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