Find all School-related info fast with the new School-Specific MBA Forum

It is currently 28 Jun 2016, 12:32
GMAT Club Tests

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

The milk of many mammals contains cannabinoids, substances

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Senior Manager
Senior Manager
User avatar
Joined: 11 Sep 2005
Posts: 324
Followers: 2

Kudos [?]: 153 [0], given: 0

The milk of many mammals contains cannabinoids, substances [#permalink]

Show Tags

New post 14 Oct 2007, 20:03
1
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

73% (02:18) correct 27% (01:30) wrong based on 166 sessions

HideShow timer Statistics

The milk of many mammals contains cannabinoids, substances that are known to stimulate certain receptors in the brain. To investigate the function of cannabinoids, researchers injected newborn mice with a chemical that is known to block cannabinoides from reaching their receptors in the brain. The injected mice showed far less interest in feeding than normal newborn mice do. Therefore, cannabinoids probably function to stimulate the appetite.

Which of the following is an assumption on which the argument depends?

A. Newborn mice do not normally ingest any substance other than their
mothers’ milk.
B. Cannabinoids are the only substances in mammals’ milk that stimulate the appetite.
C. The mothers of newborn mice do not normally make any effort to encourage their babies to feed.
D. The milk of mammals would be less nutritious if it did not contain cannabinoids.
E. The chemical that blocks cannabinoids from stimulating their brain receptors does not independently inhibit the appetite.
[Reveal] Spoiler: OA
Senior Manager
Senior Manager
User avatar
Joined: 11 Sep 2005
Posts: 324
Followers: 2

Kudos [?]: 153 [0], given: 0

Re: The milk of many mammals contains cannabinoids, substances [#permalink]

Show Tags

New post 14 Oct 2007, 20:05
Assumption: "feeding" involves receptor action so B follows
Director
Director
avatar
Joined: 11 Jun 2007
Posts: 931
Followers: 1

Kudos [?]: 131 [0], given: 0

Re: The milk of many mammals contains cannabinoids, substances [#permalink]

Show Tags

New post 14 Oct 2007, 20:14
singh_amit19 wrote:
The milk of many mammals contains cannabinoids, substances that are known to stimulate certain receptors in the brain. To investigate the function of cannabinoids, researchers injected newborn mice with a chemical that is known to block cannabinoides from reaching their receptors in the brain. The injected mice showed far less interest in feeding than normal newborn mice do. Therefore, cannabinoids probably function to stimulate the appetite.

Which of the following is an assumption on which the argument depends?

A. Newborn mice do not normally ingest any substance other than their
mothers’ milk.
B. Cannabinoids are the only substances in mammals’ milk that stimulate the appetite.
C. The mothers of newborn mice do not normally make any effort to encourage their babies to feed.
D. The milk of mammals would be less nutritious if it did not contain cannabinoids.
E. The chemical that blocks cannabinoids from stimulating their brain receptors does not independently inhibit the appetite.


this was between B and E but i think E is a stronger assumption. it could be that the chemicals they injected caused the mice's appetites to decrease and not the absence of cannabinoids
Senior Manager
Senior Manager
User avatar
Joined: 11 Sep 2005
Posts: 324
Followers: 2

Kudos [?]: 153 [0], given: 0

Re: The milk of many mammals contains cannabinoids, substances [#permalink]

Show Tags

New post 14 Oct 2007, 20:22
beckee529 wrote:
singh_amit19 wrote:
The milk of many mammals contains cannabinoids, substances that are known to stimulate certain receptors in the brain. To investigate the function of cannabinoids, researchers injected newborn mice with a chemical that is known to block cannabinoides from reaching their receptors in the brain. The injected mice showed far less interest in feeding than normal newborn mice do. Therefore, cannabinoids probably function to stimulate the appetite.

Which of the following is an assumption on which the argument depends?

A. Newborn mice do not normally ingest any substance other than their
mothers’ milk.
B. Cannabinoids are the only substances in mammals’ milk that stimulate the appetite.
C. The mothers of newborn mice do not normally make any effort to encourage their babies to feed.
D. The milk of mammals would be less nutritious if it did not contain cannabinoids.
E. The chemical that blocks cannabinoids from stimulating their brain receptors does not independently inhibit the appetite.


this was between B and E but i think E is a stronger assumption. it could be that the chemicals they injected caused the mice's appetites to decrease and not the absence of cannabinoids


You are correct OA is E....please explain a little more on E!
Manager
Manager
User avatar
Joined: 07 Sep 2007
Posts: 121
Followers: 3

Kudos [?]: 16 [0], given: 0

Re: The milk of many mammals contains cannabinoids, substances [#permalink]

Show Tags

New post 14 Oct 2007, 22:19
singh_amit19 wrote:
The milk of many mammals contains cannabinoids, substances that are known to stimulate certain receptors in the brain. To investigate the function of cannabinoids, researchers injected newborn mice with a chemical that is known to block cannabinoides from reaching their receptors in the brain. The injected mice showed far less interest in feeding than normal newborn mice do. Therefore, cannabinoids probably function to stimulate the appetite.

Which of the following is an assumption on which the argument depends?

A. Newborn mice do not normally ingest any substance other than their
mothers’ milk.
B. Cannabinoids are the only substances in mammals’ milk that stimulate the appetite.
C. The mothers of newborn mice do not normally make any effort to encourage their babies to feed.
D. The milk of mammals would be less nutritious if it did not contain cannabinoids.
E. The chemical that blocks cannabinoids from stimulating their brain receptors does not independently inhibit the appetite.


E.

The only variables that were different between the control group "normal newborn mice" and "injected newborn mice" was the chemical and the cannabinoids. Since we're testing for the latter, if we can fault the chemical, then the experiment is not valid.

B is not as strong because say, for instance, the chemical caused them to have only 10% of the energy they normally would have. This would not be a direct change in their appetite, but they may show low-appetite behavior.
Intern
Intern
avatar
Joined: 02 Sep 2007
Posts: 2
Followers: 0

Kudos [?]: 0 [0], given: 0

Re: The milk of many mammals contains cannabinoids, substances [#permalink]

Show Tags

New post 14 Oct 2007, 23:17
The chemical that blocks cannabinoids from stimulating their brain receptors "does not independently inhibit the appetite"
can u pls clarify on this
VP
VP
avatar
Joined: 15 Jul 2004
Posts: 1473
Schools: Wharton (R2 - submitted); HBS (R2 - submitted); IIMA (admitted for 1 year PGPX)
Followers: 21

Kudos [?]: 145 [0], given: 13

Re: The milk of many mammals contains cannabinoids, substances [#permalink]

Show Tags

New post 15 Oct 2007, 07:52
ajay85 wrote:
The chemical that blocks cannabinoids from stimulating their brain receptors "does not independently inhibit the appetite"
can u pls clarify on this


Means it does not of its own accord (meaning by its own presence) inhibit appetite instead of indirectly inhibiting apetite by blocking canabinoids as mentioned in the passage.
Senior Manager
Senior Manager
avatar
Joined: 06 Aug 2007
Posts: 368
Followers: 1

Kudos [?]: 32 [0], given: 0

Re: The milk of many mammals contains cannabinoids, substances [#permalink]

Show Tags

New post 22 Oct 2007, 07:30
singh_amit19 wrote:
The milk of many mammals contains cannabinoids, substances that are known to stimulate certain receptors in the brain. To investigate the function of cannabinoids, researchers injected newborn mice with a chemical that is known to block cannabinoides from reaching their receptors in the brain. The injected mice showed far less interest in feeding than normal newborn mice do. Therefore, cannabinoids probably function to stimulate the appetite.

Which of the following is an assumption on which the argument depends?

A. Newborn mice do not normally ingest any substance other than their
mothers’ milk.
B. Cannabinoids are the only substances in mammals’ milk that stimulate the appetite.
C. The mothers of newborn mice do not normally make any effort to encourage their babies to feed.
D. The milk of mammals would be less nutritious if it did not contain cannabinoids.
E. The chemical that blocks cannabinoids from stimulating their brain receptors does not independently inhibit the appetite.



Its E....A--->B ..you have to make sure that there is no C --->B

or in simpler words there is no other alternative paths to the conclusion
CEO
CEO
User avatar
Joined: 29 Mar 2007
Posts: 2583
Followers: 19

Kudos [?]: 341 [0], given: 0

Re: The milk of many mammals contains cannabinoids, substances [#permalink]

Show Tags

New post 22 Oct 2007, 18:51
singh_amit19 wrote:
The milk of many mammals contains cannabinoids, substances that are known to stimulate certain receptors in the brain. To investigate the function of cannabinoids, researchers injected newborn mice with a chemical that is known to block cannabinoides from reaching their receptors in the brain. The injected mice showed far less interest in feeding than normal newborn mice do. Therefore, cannabinoids probably function to stimulate the appetite.

Which of the following is an assumption on which the argument depends?

A. Newborn mice do not normally ingest any substance other than their
mothers’ milk.
B. Cannabinoids are the only substances in mammals’ milk that stimulate the appetite.
C. The mothers of newborn mice do not normally make any effort to encourage their babies to feed.
D. The milk of mammals would be less nutritious if it did not contain cannabinoids.
E. The chemical that blocks cannabinoids from stimulating their brain receptors does not independently inhibit the appetite.


E.

A: this was my contendor til I read E. But its weak.
B: this assumption is too extreme.
C: irrelevant
D: Irrelevant

E suggests that possibly the chemical was the cause. If this were the case the argument would be weakend. So E it is.
Manager
Manager
avatar
Joined: 07 Sep 2007
Posts: 80
Followers: 1

Kudos [?]: 6 [0], given: 0

Re: The milk of many mammals contains cannabinoids, substances [#permalink]

Show Tags

New post 22 Oct 2007, 19:30
agree with E.

If the chemical blocks appetite that it does not matter if it blocks cannabinoids.
1 KUDOS received
Senior Manager
Senior Manager
User avatar
Joined: 10 Mar 2013
Posts: 290
GMAT 1: 620 Q44 V31
GMAT 2: 690 Q47 V37
GMAT 3: 610 Q47 V28
GMAT 4: 700 Q50 V34
GMAT 5: 700 Q49 V36
GMAT 6: 690 Q48 V35
GMAT 7: 750 Q49 V42
GMAT 8: 730 Q50 V39
Followers: 3

Kudos [?]: 76 [1] , given: 2404

Re: The milk of many mammals contains cannabinoids, substances [#permalink]

Show Tags

New post 26 Apr 2014, 21:00
1
This post received
KUDOS
My explanation:

E

Scenario
Two Groups of Mice
Group 1: the control group and had no chemical blocking cannabinoids.
Group 2: Had the chemical.

Result
Group 2 showed less interest in eating therefore cannabinoids function is stimulating appetite.

Negation of E: However, what if the chemical used in blocking cannabinoids by itself blocked the appetite? Then, this invalidates the experiment and thus the argument, and we can't say that cannabinoids stimulates appetite, because the chemical would be the one responsible for blocking the appetite.

Moderators, please change the OA to E according to Stacey's reply here: http://www.manhattangmat.com/forums/cr- ... -t682.html.
GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 01 Oct 2013
Posts: 8071
Followers: 738

Kudos [?]: 152 [0], given: 0

Premium Member
Re: The milk of many mammals contains cannabinoids, substances [#permalink]

Show Tags

New post 21 Sep 2015, 16:40
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Manager
Manager
User avatar
Joined: 08 Jun 2015
Posts: 126
Location: India
Followers: 1

Kudos [?]: 3 [0], given: 64

CAT Tests
Re: The milk of many mammals contains cannabinoids, substances [#permalink]

Show Tags

New post 06 May 2016, 03:25
The answer is option E. My understanding :

Conclusion : Cannabinoids probably function to stimulate the appetite

Premises : Cannabinoids stimulate inhibitors ; Mice were injected with chemicals to counter the effect of Cannabinoids ; Mice showed less appetite.
The author reasons that because cannabinoids did not reach the receptors and mice showed lesser appetite, cannabinoids stimulate appetite.

Pre-thinking : This is an assumption type question, so what is the gap between the stated facts and the conclusion ? What if something else led to reduced appetite ? We need to negate this possibility.

Sift through the answer options; only E fits the bill. B is in the race but looses out .... because how does it matter if it is the "only" substance or not ? Run a negation test on E and your conclusion breaks.

Hence E it is !
_________________

" The few , the fearless "

Re: The milk of many mammals contains cannabinoids, substances   [#permalink] 06 May 2016, 03:25
    Similar topics Author Replies Last post
Similar
Topics:
3 Experts publish their posts in the topic Paradox Revision: Country X contains many rivers that souvik101990 6 06 Mar 2015, 22:05
1 Country X contains many rivers that flow down from its high GetThisDone 2 28 Apr 2012, 22:38
2 Pasteurization of milk is a process by which milk is heated IEsailor 7 19 Mar 2011, 13:08
5 The milk of many mammals contains cannabinoids, substances JCLEONES 4 11 Feb 2008, 11:38
Different mammals in many parts of the world have what is tarek99 11 05 Dec 2007, 08:13
Display posts from previous: Sort by

The milk of many mammals contains cannabinoids, substances

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


cron

GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.