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Manager
Joined: 04 Oct 2011
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Location: India
Concentration: Entrepreneurship, International Business
GMAT 1: 440 Q33 V13
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Citing the frequency with which gum disease and heart [#permalink]
 28 Nov 2012, 03:37
Question Stats:
22% (02:04) correct
77% (01:44) wrong based on 0 sessions
Citing the frequency with which gum disease and heart disease occur in the same patients, many dentists believe that periodontal disease is a cause of a variety of cardiovascular problems, including Coronary Artery Disease. Which of the following, if true, would most weaken the claim that periodontal disease is a cause of Coronary Artery disease? A) Bacteria present in infected gums can become mobile and enter the bloodstream, causing arterial plaque to accumulate. B) People who brush and floss their teeth regularly are also more likely to exercise and eat a healthy diet. C) Infected gums are more prone to bleeding, which allows bacteria to escape the mouth and irritate arteries. D) People who experience loss of teeth due to periodontal disease usually cut back on many foods that are harder to chew, such as lean meats and vegetables, and increase their consumption of processed foods like pudding and ice cream. E) Patients with no history of heart disease are much less likely to have periodontal disease than patients who have had a cardiac transplant. This ques seems very simple... But i doubt OA Source: Grockit
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Re: Citing the frequency with which gum disease and heart diseas [#permalink]
28 Nov 2012, 04:42
shanmugamgsn wrote: Citing the frequency with which gum disease and heart disease occur in the same patients, many dentists believe that periodontal disease is a cause of a variety of cardiovascular problems, including Coronary Artery Disease.
Which of the following, if true, would most weaken the claim that periodontal disease is a cause of Coronary Artery disease?
A) Bacteria present in infected gums can become mobile and enter the bloodstream, causing arterial plaque to accumulate.
B) People who brush and floss their teeth regularly are also more likely to exercise and eat a healthy diet.
C) Infected gums are more prone to bleeding, which allows bacteria to escape the mouth and irritate arteries.
D) People who experience loss of teeth due to periodontal disease usually cut back on many foods that are harder to chew, such as lean meats and vegetables, and increase their consumption of processed foods like pudding and ice cream.
E) Patients with no history of heart disease are much less likely to have periodontal disease than patients who have had a cardiac transplant.
This ques seems very simple... But i doubt OA
Source: Grockit this is classic case of Cause and effect argument. Cause -> periodontal disease PD Effect -> gum disease and heart disease GD and HD By POE we can reach B, E has the wrong comparisons. other 3 choices are just wrong Cheers
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Manager
Joined: 04 Oct 2011
Posts: 228
Location: India
Concentration: Entrepreneurship, International Business
GMAT 1: 440 Q33 V13
GMAT 2: 0 Q0 V0
GPA: 3
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Kudos [?]:
17
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Re: Citing the frequency with which gum disease and heart diseas [#permalink]
28 Nov 2012, 19:52
Jp27 wrote: shanmugamgsn wrote: Citing the frequency with which gum disease and heart disease occur in the same patients, many dentists believe that periodontal disease is a cause of a variety of cardiovascular problems, including Coronary Artery Disease.
Which of the following, if true, would most weaken the claim that periodontal disease is a cause of Coronary Artery disease?
A) Bacteria present in infected gums can become mobile and enter the bloodstream, causing arterial plaque to accumulate.
B) People who brush and floss their teeth regularly are also more likely to exercise and eat a healthy diet.
C) Infected gums are more prone to bleeding, which allows bacteria to escape the mouth and irritate arteries.
D) People who experience loss of teeth due to periodontal disease usually cut back on many foods that are harder to chew, such as lean meats and vegetables, and increase their consumption of processed foods like pudding and ice cream.
E) Patients with no history of heart disease are much less likely to have periodontal disease than patients who have had a cardiac transplant.
This ques seems very simple... But i doubt OA
Source: Grockit this is classic case of Cause and effect argument. Cause -> periodontal disease PD Effect -> gum disease and heart disease GD and HD By POE we can reach B, E has the wrong comparisons. other 3 choices are just wrong Cheers Thanks JP27 But i'm still confused.... How E is wrong comparison???? E) Patients with no history of heart disease are much less likely to have periodontal disease than patients who have had a cardiac transplant. No HD ---> No PD For weaken questions choices with "effect to cause" is correct answer... This is wat stated in E. But how come B will be answer its no way related to weaken or strengthen... without our external knowledge we cannot determine B ???? 
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Re: Citing the frequency with which gum disease and heart diseas [#permalink]
28 Nov 2012, 20:30
Citing the frequency with which gum disease and heart disease occur in the same patients, many dentists believe that periodontal disease is a cause of a variety of cardiovascular problems, including Coronary Artery Disease. Which of the following, if true, would most weaken the claim that periodontal disease is a cause of Coronary Artery disease? this is a scenario which means if A, B occur simultaneously means A causes B;
to weaken we will tell
i)When A occurs, B does not happen
ii)B happens even whenA is not there
iii)C causes B not A
To strengthen we need to do the following
i) Say C is not the cause
ii)give an example when A occurs B occurs
iii)when Not A -> Not B
iv)possible problems with the data
A) Bacteria present in infected gums can become mobile and enter the bloodstream, causing arterial plaque to accumulate. strengthens the argument telling missing linkB) People who brush and floss their teeth regularly are also more likely to exercise and eat a healthy diet. giving a alternative cause execise and healthy habits that can lead to , also here it is not that A causes B , it tells b is likely also.. C) Infected gums are more prone to bleeding, which allows bacteria to escape the mouth and irritate arteries. strengthens the argument telling missing linkD) People who experience loss of teeth due to periodontal disease usually cut back on many foods that are harder to chew, such as lean meats and vegetables, and increase their consumption of processed foods like pudding and ice cream. it has no effect , to think this strengthens is out of scope..we don't know hthe effects of processed food E) Patients with no history of heart disease are much less likely to have periodontal disease than patients who have had a cardiac transplant. strengthens as it tells ; no periodental low heart disease but cardiac transplant history more chances Periodontal disease not A -> not B Please correct me if i m wrong somewhere...
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Re: Citing the frequency with which gum disease and heart diseas [#permalink]
29 Nov 2012, 04:48
sujit2k7 wrote: iii)when Not A -> Not B
I think the above is inccorect to say. Rather, Not B -> Not A.
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Re: Citing the frequency with which gum disease and heart diseas [#permalink]
29 Nov 2012, 07:46
stoy4o wrote: sujit2k7 wrote: iii)when Not A -> Not B
I think the above is inccorect to say. Rather, Not B -> Not A. For strengthen question type when cause does not occur the effect does not occur... if storm causes tornadoes then this can be strengthened by saying no tornado happens when there is no tide.[absence of the cause tide , => absence of the effect tornado] Plz correct if my understanding is wrong....
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Re: Citing the frequency with which gum disease and heart diseas [#permalink]
29 Nov 2012, 08:18
This is not a good question at all though Grockit is one of my favourite company. I can reach the answer by POE but is not really well formulated. My opinion
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Re: Citing the frequency with which gum disease and heart diseas
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29 Nov 2012, 08:18
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