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It is well known that human tears often serve to moisten the

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It is well known that human tears often serve to moisten the [#permalink] New post 11 Sep 2004, 10:24
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A
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C
D
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It is well known that human tears often serve to moisten the eye, protect it from infection, and wash away irritants; such tears are called irritant or reflex tears. Dr. Field hypothesizes that emotional tears have a different biological function. She suggests that by shedding tears when under emotional stress people excrete harmful chemicals that build up in such body fluids as blood serum during emotional stress.

Each of the following, if true, provides some support for Dr. Field's hypothesis EXCEPT:
A) The people most likely to cry when undergoing emotional stress are less likely to suffer from stress-related diseases than is the population at large
B) If a local anesthetic is applied to the surface of the eye, irritant and reflex tears are inhibited, but emotional tears are not
C) The chemical composition of tears that are induced by grit in the eye is identical to the composition of tears induced by emotional stress
D) The concentration of a substance that the body produces only under conditions of emotional stress is thirty times greater in tears than in blood serum
E) Patients who suffer from a condition that prevents secretion of tears display a slower than normal physiological recovery from emotional stress
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 [#permalink] New post 11 Sep 2004, 10:38
A. No relation had been identified in the hyposthesis between emotional tears and diseases related to stress.
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 [#permalink] New post 11 Sep 2004, 11:04
I think C.
If the emotianal tear and irritant tear have the same composition, then there is no extra harmful-emotional-secretion eliminated.
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 [#permalink] New post 11 Sep 2004, 16:21
A is my choice. Grit is more of an irritation, vex, annoy ( emotion ) so I eliminated choice C.
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 [#permalink] New post 12 Sep 2004, 16:51
B, D and E strengthen the argument and can be eliminated.
If reflex tears (which wash away the dirt and irritants) and emotional tears have the same chemical composition, then emotional tears DO NOT serve the DIFFERENT biological function of removing harmful chemicals from our body, which clearly undermies Dr. Field's hypothesis.

So, I will go with C.
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 [#permalink] New post 12 Sep 2004, 18:48
Conclusion: emotional tears serve to excrete harmful chemicals built up during emotional stres
We want to the statement that does not support this theory.

Each of the following, if true, provides some support for Dr. Field's hypothesis EXCEPT:

A) The people most likely to cry when undergoing emotional stress are less likely to suffer from stress-related diseases than is the population at large
-- This supports the theory that if you cry during emotional stress (thus producing emotional tears), you are less likely to suffer from stress related disease because the tears remove the chemcicals built up by emotional stress

B) If a local anesthetic is applied to the surface of the eye, irritant and reflex tears are inhibited, but emotional tears are not
-- This statement tells us emotional tears can also function as reflex tears. Nothing is said about emotional tears not being able to remove chemicals produced by the body under emotional stress

C) The chemical composition of tears that are induced by grit in the eye is identical to the composition of tears induced by emotional stress
-- Does not support the thoery. Here, it says the composition of reflex tears are the same as emotional tears

D) The concentration of a substance that the body produces only under conditions of emotional stress is thirty times greater in tears than in blood serum
-- Support the theory that emotional tears remove harmful chemicals

E) Patients who suffer from a condition that prevents secretion of tears display a slower than normal physiological recovery from emotional stress
-- Also supports the theory that emotional tears helps to recover one from emotional stress

Choice C for me.
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 [#permalink] New post 12 Sep 2004, 19:10
It is D for me. Reason, the substance is produced in the eye , not excreted thru eye.
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 [#permalink] New post 12 Sep 2004, 19:36
OA is C
Beautiful explanation ywilfred. I think the key to this CR is to understand that to "excrete harmful chemicals" is a good thing. You actually get rid of them and it's good for the body.
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  [#permalink] 12 Sep 2004, 19:36
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