Multiple Sclerosis Is an Immune-Mediated Disease Where the Immune System

question 71

Multiple Choice

Multiple sclerosis is an immune-mediated disease where the immune system targets the myelin surrounding neurons in the CNS and causes scar tissue to build up in the spinal cord. How will this affect the peripheral nerves?

• A) The scar tissue in the white matter, combined with inflammation, puts pressure on the grey matter and kills the cell bodies there.
• B) The scar tissue replaces the myelin and so there are no major effects because the nerves can function as normal.
• C) The removal of the myelin sheath slows down electron potentials and makes them less consistent.
• D) The removal of the myelin sheath speeds up the electron potential by allowing it travel down the whole neuron rather than jumping.