PT102.S2.Q17 > Question

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SECTION 3 · lr

SECTION 4 · lr

Why do cigarette smokers who do not chew tobacco have a higher incidence of heart attacks and high blood pressure than nonsmokers who chew tobacco (and who are exposed to the same amount of nicotine)?

The right answer will be a hypothesis that does not offer a useful difference between cigarette smokers who do not chew tobacco and nonsmokers who chew tobacco. The incorrect answers will offer useful differences between these two groups, providing reasons for why the cigarette smokers showed a higher incidence of heart attacks and high blood pressure, even though both groups were exposed to the same amount of nicotine.

This could help resolve the discrepancy. The nonsmokers who chew tobacco exercise more, which presumably lowers their risk of heart attacks and high blood pressure compared to the smokers who do not chew tobacco.

This could help resolve the discrepancy. The nonsmokers who chew tobacco ingest chemicals that mitigate nicotine’s harmful effects, while the smokers do not. This could decrease the risk of heart attacks and high blood pressure in nonsmokers who chew tobacco.

This could help resolve the discrepancy. The healthier diets of the nonsmokers who chew tobacco presumably decrease their risk of heart attacks and high blood pressure compared to the smokers who do not chew tobacco.

This would not help resolve the discrepancy, and is therefore the correct answer. (D) discusses cancer, not heart attacks and high blood pressure.

This could help resolve the discrepancy. If cigarette smokers are ingesting chemicals that raise blood pressure, it would help explain why they have a higher incidence of high blood pressure.

PrepTest 102 - Section 2 - Question 17

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