In the disease _____, the myelin sheath is destroyed.

• A. multiple sclerosis
• B. epilepsy
• C. depression
• D. schizophrenia

Answer: (A)

Verified step by step guidance

1. Understand the role of the myelin sheath: The myelin sheath is a protective covering that surrounds axons in the nervous system, facilitating the rapid transmission of electrical signals between neurons.
2. Identify the disease associated with myelin sheath destruction: Consider diseases that are known to affect the nervous system and specifically target the myelin sheath.
3. Review the options provided: multiple sclerosis, epilepsy, depression, and schizophrenia. Consider which of these diseases is characterized by damage to the myelin sheath.
4. Recall that multiple sclerosis is a neurological condition where the immune system attacks the myelin sheath, leading to communication problems between the brain and the rest of the body.
5. Conclude that the disease in which the myelin sheath is destroyed is multiple sclerosis, as it directly involves the degradation of this protective layer around nerve fibers.