Question

What is multiple sclerosis (MS)?

a.

A degenerative disease

b.

An abnormal growth that involves the brain

c.

A condition characterized by recurring seizures

d.

A disease of the central nervous system that leads to recurring attacks of neurological symptoms

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Answer: (d).A disease of the central nervous system that leads to recurring attacks of neurological symptoms Explanation:Multiple sclerosis (MS) is a disease of the central nervous system which leads to recurring attacks of neurological symptoms. Nerve fibers are covered with a substance called myelin, which acts as an insulator and allows impulses to travel down the nerves quickly and efficiently. In MS, the myelin becomes inflamed and scarred, and is eventually destroyed (demyelination). The nerve impulses become weaker as the myelin is less efficient, and may eventually fail altogether. Eventually the nerves will stop responding to the signals from the brain.

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