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Black Americans are, on the whole, about twice as likely as

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Black Americans are, on the whole, about twice as likely as [#permalink] New post 26 Sep 2006, 09:05
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A
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D
E

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Black Americans are, on the whole, about twice as likely as White Americans to develop high blood pressure. This likelihood also holds for westernized Black Africans when compared to White Africans.
Researchers have hypothesized that this predisposition in westernized Blacks may reflect an interaction between western high-salt diets and genes that adapted to an environmental scarcity of salt.

Which of the following statements about present-day, westernized Black Africans, if true, would most tend to confirm the researchers’ hypothesis?

(A) The blood pressures of those descended from peoples situated throughout their history in Senegal and Gambia, where salt was always available, are low.

(B) The unusually high salt consumption in certain areas of Africa represents a serious health problem.

(C) Because of their blood pressure levels, most White Africans have markedly decreased their salt consumption.

(D) Blood pressures are low among the Yoruba, who, throughout their history, have been situated far inland from sources of sea salt and far
south of Saharan salt mines.

(E) No significant differences in salt metabolism have been found between those people who have had salt available throughout their history and those who have not.
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 [#permalink] New post 26 Sep 2006, 09:20
Should be A...
Blood pressure of people from Senegal and Gambia, where salt was always available, are low...Only those westernized Blacks have high blood pressures whose environments had salt scarcity...strenthens the hypothesis
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 [#permalink] New post 26 Sep 2006, 09:21
Looks like D.
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 [#permalink] New post 26 Sep 2006, 09:46
will go with A
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 [#permalink] New post 26 Sep 2006, 10:45
Looks like A
Low Salt availability => High Blood pressure

A) The blood pressures of those descended from peoples situated throughout their history in Senegal and Gambia, where salt was always available, are low. High Salt availability => Low Blood pressure. Possible.will keep it.

(B) The unusually high salt consumption in certain areas of Africa represents a serious health problem. - Irrelevant

(C) Because of their blood pressure levels, most White Africans have markedly decreased their salt consumption. Tries to offer circular reasoning.Hence not an effecive solution

(D) Blood pressures are low among the Yoruba, who, throughout their history, have been situated far inland from sources of sea salt and far
south of Saharan salt mines. - weakens the argumnet instead of confirmimg it. Since - Low salt availability => Low blood pressure

(E) No significant differences in salt metabolism have been found between those people who have had salt available throughout their history and those who have not.- Does not confirm the argument
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Re: CR - blood pressure and salt [#permalink] New post 26 Sep 2006, 17:02
iced_tea wrote:
Black Americans are, on the whole, about twice as likely as White Americans to develop high blood pressure. This likelihood also holds for westernized Black Africans when compared to White Africans.
Researchers have hypothesized that this predisposition in westernized Blacks may reflect an interaction between western high-salt diets and genes that adapted to an environmental scarcity of salt.

Which of the following statements about present-day, westernized Black Africans, if true, would most tend to confirm the researchers’ hypothesis?

(A) The blood pressures of those descended from peoples situated throughout their history in Senegal and Gambia, where salt was always available, are low.

(B) The unusually high salt consumption in certain areas of Africa represents a serious health problem.

(C) Because of their blood pressure levels, most White Africans have markedly decreased their salt consumption.

(D) Blood pressures are low among the Yoruba, who, throughout their history, have been situated far inland from sources of sea salt and far
south of Saharan salt mines.

(E) No significant differences in salt metabolism have been found between those people who have had salt available throughout their history and those who have not.


Yes , A

A confirms the connection between salt availability and blood pressure.


D weakens the hypothesis.
Re: CR - blood pressure and salt   [#permalink] 26 Sep 2006, 17:02
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