Final answer:
Multiple sclerosis (MS) is an autoimmune disease that destroys the myelin sheaths in the central nervous system, disrupting the timing of neural transmission and interfering with muscle control.
Step-by-step explanation:
Multiple sclerosis (MS) is a disease in which the myelin sheaths, which insulate neurons in the central nervous system, are destroyed and replaced by hard, fibrous tissue. This disrupts the timing of neural transmission, interfering with muscle control. The disease is an example of an autoimmune disease, where antibodies produced by lymphocytes mark myelin as something that should not be in the body, causing inflammation and destruction of the myelin. As a result, scarring occurs and multiple scars can be found in the white matter of the brain and spinal cord.