15. What are some diseases
characterized by progressive
loss of the axonal myelin
sheath?

Gap-fill exercise

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Multiple sclerosis is severe disease
caused progressive destruction of
myelin sheath in central nervous
system. Guillain-Barré disease is
to destruction of myelin sheath
in peripheral nervous system
by auto-immunity (attack the own
immune ). The genetic deficiency
the formation or of the
myelin is an X-linked
called adrenoleukodystrophy. The
“Lorenzo’s Oil” featured boy with this
and his father's search
for treatment.