Question

Manisha has multiple sclerosis. She experiences muscle weakness, loss of coordination and speech, and visual disturbances that result from the slowdown or interruption of neural transmission. The cause of these symptoms probably involves the degeneration of patches of the _____ on the axon of the motor neurons.

Answer 1

Answer:

Myelin sheath

Explanation:

Multiple sclerosis is a disease of the central nervous system which results from the degeneration of the protective (myelin) sheath of nerve fibers (axon).

Axons are generally responsible for carrying nerve impulses away from the cell bodies of neurons. Once the myelin sheath becomes damaged, it results in gradual deterioration to the axon and creates a communication gap between the brain and other parts of the body.

The communication gap elicits a variety of symptoms in an affected person. The symptoms however may vary depending on the location of the axon and the extent of deterioration to the myelin sheath. It ranges from muscle weakness, electric shock sensation, unsteady gait, fatigue, slurred speech and son on.