A Patient Is Newly Diagnosed with Multiple Sclerosis (MS)

question 22

Multiple Choice

A patient is newly diagnosed with multiple sclerosis (MS) .What physiological change is causing the patient's symptoms?

• A) Depletion of dopamine in the central nervous system (CNS)
• B) Demyelination of nerve fibers in the CNS
• C) The development of neurofibril webs in the CNS
• D) Reduced amounts of acetylcholine at the neuromuscular junction

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Definitions:

Genetic Monogamy

A form of monogamy based on genetic tests which confirm that a pair of animals mate exclusively with each other.

Evolutionary Fitness

The ability of an organism to survive and reproduce, thereby passing on its genes to the next generation.

Social Monogamy

A form of monogamy observed in animal behavior where individuals pair bond to cooperate in the rearing of offspring, even if not exclusively sexually monogamous.

Confusion Effect

A phenomenon by which a predator's ability to pick out individual prey is hampered by a large group of potential targets.