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# The interstitial nucleus, a subregion of the brain's

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The interstitial nucleus, a subregion of the brain's [#permalink]

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05 Aug 2009, 13:07
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44% (01:28) correct 56% (02:07) wrong based on 32 sessions

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The interstitial nucleus, a subregion of the brain's hypothalamus, is typically smaller for male cats than for female cats. A neurobiologist perFORMed autopsies on male cats who died from disease X, a disease affecting no more than .05 percent of male cats, and found that these male cats had interstitial nuclei that were as large as those generally found in female cats. Thus, the size of the interstitial nucleus determines whether or not male cats can contract disease X.

Which one of the following statements, if true, most seriously weakens the argument?

(A) No female cats have been known to contract disease X, which is a subtype of disease Y.

(B) Many male cats who contract disease X also contract disease Z, the cause of which is unknown.

(C) the interstitial nuclei of female cats who contact disease X are larger than those of female cats who do not contract disease X.

(D) Of 1,000 autopsies on male cats who did not contract disease X, 5 revealed interstitial nuclei larger than those of the average male cat.

(E) The hypothalamus is known not to be causally linked to disease Y, and disease X is a subtype of disease Y.
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05 Aug 2009, 13:28
IMO E
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05 Aug 2009, 13:46
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[EDIT - REMOVED BY THE USER]

Last edited by nplaneta on 17 Jun 2012, 19:08, edited 1 time in total.
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05 Aug 2009, 13:55
I agree with E
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05 Aug 2009, 17:18
I will go with E, the passage states that bigger hypothalamus causes the possibility of contract the diseases X, but E denies it, thus weakens the argument
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06 Aug 2009, 01:09
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Confused b/w A and E.

A seems stronger.
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06 Aug 2009, 02:03
+1 for E

wats the OA??
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06 Aug 2009, 02:54
Confusing one. Will go with E as it shows that there is no know relations between the two.
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06 Aug 2009, 06:34
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Is D the answer. though its isnt my first answer choice. but after some thinking there are some reasons in favor of it.

Since we have to refute claim made against Male cats, this choice does refer to male cats. Also, unlike conclusion that claims that the size determines (meaning to say it certain that disease causes enlargement. Therefore even if 5 out of 1000 have got larger nuclei even without disease does refute the certainity

If i am right i will be happy. but for sure i would have got it wrong on a test day
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06 Aug 2009, 07:24
[EDIT - REMOVED BY THE USER]

Last edited by nplaneta on 17 Jun 2012, 19:08, edited 1 time in total.
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06 Aug 2009, 07:31
OA IS E!
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06 Aug 2009, 09:20
Can you please post the OE?

I am not able to eliminate A.
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06 Aug 2009, 09:51
sudeep wrote:
Can you please post the OE?

I am not able to eliminate A.

Thus, the size of the interstitial nucleus determines whether or not male cats can contract disease X.

so i think female cat interstitial nucleus has nothing to do with male cat contract disease x, that's how i took A out..
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06 Aug 2009, 09:57
sprtng wrote:
sudeep wrote:
Can you please post the OE?

I am not able to eliminate A.

Thus, the size of the interstitial nucleus determines whether or not male cats can contract disease X.

so i think female cat interstitial nucleus has nothing to do with male cat contract disease x, that's how i took A out..

Thanks! Missed to analyze that.
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06 Aug 2009, 10:31
E
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08 Aug 2009, 08:19
Tough one.. is it from LSAT papers ?
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08 Aug 2009, 23:16
Tough one bro...but only E sounded anywhere near
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14 Aug 2009, 18:30
24. The interstitial nucleus, a sub-region of the brain’s hypothalamus, is typically smaller for male cats than for female cats. A neurobiologist performed autopsies on male cats who died from disease X, a disease affecting no more than .05 percent of male cats, and found that these male cats had interstitial nuclei that were as large as those generally found in female cats. Thus, the size of the interstitial nucleus determines whether or not male cats can contract disease X.

Which one of the following statements, if true, most seriously weakens the argument?

A. No female cats have been known to contract disease X, which is a subtype of disease Y.
B. Many male cats that contract disease X also contract disease Z, the cause of which is unknown.
C. the interstitial nuclei of female cats who contact disease X are larger than those of female cats who do not contract disease X.
D. Of 1,000 autopsies on male cats that did not contract disease X, 5 revealed interstitial nuclei larger than those of the average male cat.
E. The hypothalamus is known not to be causally linked to disease Y, and disease X is a subtype of disease Y.

why not A
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14 Aug 2009, 18:40
IMO D.
D. Of 1,000 autopsies on male cats that did not contract disease X, 5 revealed interstitial nuclei larger than those of the average male cat - .5 percent of the male cats without disease X reveal large nuclei. This number is greater than .05 percent and this surely weakens the statement.
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14 Aug 2009, 22:44
Concur with D.
Re: cat disease   [#permalink] 14 Aug 2009, 22:44

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