The information in the passage indicates that if human beings were given a drug that inhibits the action of serotonin...

Reina January 30, 2020

Number 24

I'm still confused why the answer is A when the last paragraph says if serotonin is inhabited there is less or a craving for carbs (line 49)...doesn't A say the opposite? I chose C because it says those who don't crave carbs become sleepy since when serotonin is inhibited it causes one to not want to eat carbs. Can you explain this to me? Thanks! @mehran

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Irina January 30, 2020

@Reina,

The question asks us to make an inference based on the information in the passage - if human beings were given a drug that inhibits the actions of serotonin, which of the following would we expect to occur?

The passage tells us that drugs that inhibit serotonin often induce carbohydrate craving and weight gain (lines 12-14), which allows us to infer that (A) is the correct answer. These subjects are likely to crave carbohydrates. Line 49 is actually saying the opposite - this paragraph starts with telling us that a serotonin-like drug selectively suppresses hydrocarbons snacking (as would serotonin in non-drug form per lines 10-11 that tells us that serotonin causes weight loss. Thus, inhibiting serotonin causes more craving for carbohydrates.

I am assuming you meant (B), not (C). (B) is incorrect because it would be true of subjects who do not crave carbohydrates, meaning subjects whose serotonin levels are not inhibited (lines 59-61).

Let me know if this makes sense and if you have any other questions.