Question

1. demyelination occurs in which of the following diseases?

○ amyotrophic lateral sclerosis
○ multiple sclerosis
○ neurofibromatosis
○ parkinsons disease

1. concave lenses are used to correct _____ , and convex lenses are used to correct _____ .

○ presbyopia; emmetropia
○ emmetropia; myopia
○ diplopia; myopia
○ myopia; presbyopia

Explanation:

Question 114

• Amyotrophic lateral sclerosis (ALS) involves motor neuron degeneration, not primary demyelination.
• Multiple sclerosis (MS) is characterized by the demyelination of nerve fibers in the central nervous system.
• Neurofibromatosis is a genetic disorder affecting nerve tissue growth, not demyelination.
• Parkinson's disease involves dopamine - producing neuron degeneration, not demyelination.

• Myopia (nearsightedness) occurs when light focuses in front of the retina. Concave lenses diverge light, so they are used to correct myopia.
• Presbyopia is age - related farsightedness, and convex lenses (which converge light) are used to correct it. Emmetropia is normal vision, and diplopia is double vision, which is not corrected by these lenses in this way.

Answer:

B. Multiple sclerosis

Question 115