PrepTest 67, Section 2, Question 5
The hormone testosterone protects brain cells from injury and reduces levels of the protein beta-amyloid in the brain. Beta-amyloid causally contributes to Alzheimer's disease, and people whose brain cells are susceptible to injury are probably more susceptible to Alzheimer's disease. So there is reason to think that _______.
The hormone testosterone protects brain cells from injury and reduces levels of the protein beta-amyloid in the brain. Beta-amyloid causally contributes to Alzheimer's disease, and people whose brain cells are susceptible to injury are probably more susceptible to Alzheimer's disease. So there is reason to think that _______.
The hormone testosterone protects brain cells from injury and reduces levels of the protein beta-amyloid in the brain. Beta-amyloid causally contributes to Alzheimer's disease, and people whose brain cells are susceptible to injury are probably more susceptible to Alzheimer's disease. So there is reason to think that _______.
The hormone testosterone protects brain cells from injury and reduces levels of the protein beta-amyloid in the brain. Beta-amyloid causally contributes to Alzheimer's disease, and people whose brain cells are susceptible to injury are probably more susceptible to Alzheimer's disease. So there is reason to think that _______.
Which one of the following most logically completes the argument?
anyone whose brain cells are susceptible to injury will eventually develop Alzheimer's disease
whether a person develops Alzheimer's disease is dependent entirely on the level of beta-amyloid in his or her brain
Alzheimer's disease leads to a reduction in testosterone level
only people with Alzheimer's disease are at risk for injury to brain cells
a decline in testosterone level puts one at increased risk for Alzheimer's disease
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