Question

culties? People with multiple sclerosis (MS) experience many challenging symptoms. Which statement best explains one cause of these difficulties? Loss of oligodendrocytes in the central nervous system results in absence of the myelin sheath of neuronal axons, impairing rapid saltatory conduction. An increase in the number of oligodendrocytes in the central nervous system results in an overgrowth of the myelin sheath of neuronal axons, resulting in abnormally large action potentials. Damage to ependymal cells results in stagnation of cerebrospinal fluid, damaging neurons. A loss of astrocytes causes leaked neurotransmitters and K+ to accumulate, impairing generation of action potentials.

Answer 1

Answer:

Option (1).

Explanation:

Multiple sclerosis may be defined as the medical condition in which the individual may lose the ability to walk and think. The brain and spinal cord get damaged in the multiple sclerosis.

The oligodenedrocytes that are involved in the formation of myelin sheath of the central nervous systrem are lost. This might result in the absence of myelin sheath and impairs the saltatory conduction. The speed of the transmission of the nerve impulse decreases.

Thus, the correct answer is option (1).