Dopamine KnewtonCR

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bvn: Senior | Next Rank: 100 Posts; Posts: 63; Joined: Sun Mar 08, 2009 7:38 am

by bvn » Fri Dec 03, 2010 2:01 am

Dopamine is a hormone and neurotransmitter that plays a pivotal role in providing a sense of pleasure in order to reward the brain and reinforce certain behaviors. However, a serious concern of neuropsychologists is that, in some people, traumatic situations can release excessive levels of dopamine in the brain, which can potentially lead to behavioral disorders such as psychoses and schizophrenia.

Which of the following, if true, points to the most serious flaw of a plan to develop an antipsychotic medication that would block the brain from experiencing the effects of dopamine?

(A) Such a medication would indiscriminately block dopamine, whether it is activated by situations that are rewarding or traumatic. correct

(B) Such a medication will not be available for many years due to the lengthy testing and approval process.

(C) Scientists have not yet discovered why these levels of dopamine are released in some people, and not in others.

(D) Such a medication will reduce a person's risk of developing psychoses but will not protect that person from developing schizophrenia. your answer

(E) This medicine will have no discernible effect on people for whom dopamine is not naturally released by rewarding situations.

Source: Beat The GMAT — Critical Reasoning | Fri Dec 03, 2010 2:01 am

shovan85: Community Manager; Posts: 991; Joined: Thu Sep 23, 2010 6:19 amFollowed by: 24 members; Location: Bangalore, India; Thanked: 146 times

by shovan85 » Fri Dec 03, 2010 3:12 am

bvn wrote:Dopamine is a hormone and neurotransmitter that plays a pivotal role in providing a sense of pleasure in order to reward the brain and reinforce certain behaviors. However, a serious concern of neuropsychologists is that, in some people, traumatic situations can release excessive levels of dopamine in the brain, which can potentially lead to behavioral disorders such as psychoses and schizophrenia.

Which of the following, if true, points to the most serious flaw of a plan to develop an antipsychotic medication that would block the brain from experiencing the effects of dopamine?

See the Red highlighted sentences and especially the Bold part. You can see that by implementing the plan the flow of Dopamine is blocked. So, this will stop one of the pivotal roles of the Brain. Clearly, the plan is flawed. If it would have used the word regulated rather than blocked then it would have been correct.

Thus Only A says so.

(A) Such a medication would indiscriminately block dopamine, whether it is activated by situations that are rewarding or traumatic.

If the problem is Easy Respect it, if the problem is tough Attack it

diebeatsthegmat: Legendary Member; Posts: 1119; Joined: Fri May 07, 2010 8:50 amFollowed by: 3 members; Thanked: 29 times

by diebeatsthegmat » Fri Dec 03, 2010 5:49 am

bvn wrote:Dopamine is a hormone and neurotransmitter that plays a pivotal role in providing a sense of pleasure in order to reward the brain and reinforce certain behaviors. However, a serious concern of neuropsychologists is that, in some people, traumatic situations can release excessive levels of dopamine in the brain, which can potentially lead to behavioral disorders such as psychoses and schizophrenia.

Which of the following, if true, points to the most serious flaw of a plan to develop an antipsychotic medication that would block the brain from experiencing the effects of dopamine?

(A) Such a medication would indiscriminately block dopamine, whether it is activated by situations that are rewarding or traumatic. correct

(B) Such a medication will not be available for many years due to the lengthy testing and approval process.

(C) Scientists have not yet discovered why these levels of dopamine are released in some people, and not in others.

(D) Such a medication will reduce a person's risk of developing psychoses but will not protect that person from developing schizophrenia. your answer

(E) This medicine will have no discernible effect on people for whom dopamine is not naturally released by rewarding situations.

please dont post the answer before discusing, and if you want to post the answer, please spoil it!

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