LSAT 137 – Section 2 – Question 05

LSAT 137 - Section 2 - Question 05

October 2012

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Question
QuickView		 Type Tags Answer
Choices		 Curve Question
Difficulty		 Psg/Game/S
Difficulty		 Explanation
PT137 S2 Q05
+LR
Most strongly supported +MSS
Fill in the blank +Fill
Causal Reasoning +CausR
A
1%
148
B
1%
148
C
1%
152
D
0%
150
E
98%
164
129
135
142
 +Easier 146.731 +SubsectionMedium

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 _______.

Summary
Testosterone protects brain cells from injury. Testosterone reduces levels of beta-amyloid, a protein, in the brain. Beta-amyloid has a causal relationship with Alzheimer’s disease. People whose brain cells are more susceptible to injury are probably more likely to get Alzheimer’s.

Strongly Supported Conclusions
Testosterone protects against Alzheimer’s by reducing the likelihood of brain cell injury. A decline in testosterone increases the risk of Alzheimer’s disease.

A
anyone whose brain cells are susceptible to injury will eventually develop Alzheimer’s disease
This is unsupported because we don’t know that being susceptible to brain cell injury is a sufficient condition for Alzheimer’s disease. We only know that people susceptible to brain cell injury are probably more susceptible to Alzheimer’s disease.
B
whether a person develops Alzheimer’s disease is dependent entirely on the level of beta-amyloid in his or her brain
This is unsupported because the stimulus leaves open the possibility that other factors besides beta-amyloid influence Alzheimer’s development.
C
Alzheimer’s disease leads to a reduction in testosterone level
This is unsupported because the causation may be the other way around. Reductions in testosterone may lead to Alzheimer’s disease.
D
only people with Alzheimer’s disease are at risk for injury to brain cells
This is unsupported because people susceptible to brain cell injury may have low testosterone with no Alzheimer’s disease.
E
a decline in testosterone level puts one at increased risk for Alzheimer’s disease
This is strongly supported because a decline in testosterone leads to increased susceptibility to brain injury, which probably makes someone more likely to develop Alzheimer’s disease.

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LSAT PrepTest 137 Explanations

Section 1 - Reading Comprehension

Section 2 - Logical Reasoning

Section 3 - Logical Reasoning

Section 4 - Logical Reasoning

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