Which of the following is true of multiple sclerosis (MS)?
A) MS is most likely to develop in a person over the age of 65.
B) The cortex is the target of MS.
C) MS is caused by misfolded prion proteins.
D) People who live close to the equator are most likely to develop MS.
E) MS is more common in people born during the late winter and early spring.

Question

Quizplus · Accepted Answer

Multiple sclerosis (MS) has been observed to have a higher prevalence in individuals born in the late winter and early spring months. This seasonal pattern of birth has been studied in relation to vitamin D levels during pregnancy, as lower sunlight exposure (and thus lower vitamin D synthesis) during winter months could influence the risk of MS in offspring. The other options provided are incorrect: MS typically develops in adults between the ages of 20 and 40, not over the age of 65; it targets the myelin sheath of nerve fibers in the central nervous system, not specifically the cortex; it is not caused by prion proteins but is considered an autoimmune disease; and prevalence is higher further from the equator, not closer to it.

Which of the Following Is True of Multiple Sclerosis (MS)