Question

the figure shows the myelin sheath, a semipermeable membrane that provides support and helps speed up the action potential in neurons. what condition occurs when the immune system causes the deterioration of the myelin sheath? a alzheimers disease b multiple sclerosis c autism d myasthenia gravis

Explanation:

Multiple sclerosis is an autoimmune disease where the immune - system attacks the myelin sheath of neurons, disrupting nerve signal transmission. Alzheimer's is related to brain cell death and amyloid - plaque buildup, autism is a neurodevelopmental disorder, and myasthenia gravis affects the neuromuscular junction.

Answer:

B. Multiple sclerosis