Reading ComprehensionDifficulty: Easy

PT112 S2 P3 Q18 Explanation

Hormones

A free, expert breakdown of this official LSAT Reading Comprehension question.

TopicsPrimary PurposeScience

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Passage

Discussions of how hormones influence behavior have generally been limited to the effects of gonadal hormones on reproductive behavior and have emphasized the parsimonious arrangement whereby the same hormones involved in the biology of reproduction also influence sexual behavior. It has now become clear, however, that other hormones, in addition to their initiated when deviations from normal are quite small, thereby maintaining plasma osmolality within relatively narrow ranges.

In the osmoregulation of body fluids, the movement of water across cell membranes permits minor fluctuations in the concentration of solutes in extracellular fluid to be buffered by corresponding changes in the relatively larger volume of cellular water. Nevertheless, the concentration of solutes in extracellular fluid may at times become elevated or is, only after osmotic dehydration exceeds the capacity of the animal to deal with it physiologically.

What this question is testing

Primary Purpose

Your task

Pin down exactly what the question asks about the passage — a detail, the author's view, the structure, or the main point — before looking at the choices.

Common trap

Answers that restate a true detail from the passage but don't answer the specific question being asked.

Winning move

Anticipate the answer in your own words from the passage, then find the choice that matches that prediction.

Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.

The question
18.

The primary function of the passage as a whole

Answer choices

  1. Correct88% picked this

    present new

    Why this is right

    This is super bland, but it works for our Old / New type framework. Discussions of how hormones influence behavior have (in the past) generally been limited to how gonadal hormones affect reproductive behavior. However, it has now become clear that other hormones can affect behavior too. That's really the only textual help we get. The rest of the passage just delves oh-so-deeply into the specifics of how other hormones can affect behavior.

    Skill tested: Primary Purpose · how this choice captures the passage's function is the move to repeat next time.

  2. Out of Scope: question assumptions3% picked this

    question standard

    This almost works. If the first sentence had said, "It is typically assumed that hormones only influence behavior by gonadal hormones affecting reproductive behavior", then the pivot to "but now we see other hormones also affect behavior" could qualify as questioning a standard assumption. But there isn't any standard assumption cited. There's just a scientific tendency. Discussions have been limited to X. There has been a bias towards talking about X. Our author isn't saying that X is untrue. She's not questioning X. She's just saying we now realize that there's more to the story than just X.

  3. Out of Scope: reinterpret4% picked this

    reinterpret earlier

    The author doesn't reinterpret any earlier findings. The earlier findings, if we can even call them that, would be about how gonadal hormones influence reproductive behavior. Nothing in the passage talks about gonadal hormones or reproductive behavior, after that first sentence, so none of the passage is reinterpreting or revising anything about gonadal hormones and reproductive behavior. The passage is "adding onto earlier findings" with new findings about other hormones that also affect behavior.

  4. Out of Scope: novel theory2% picked this

    advocate a novel

    The author isn't advocating a new theory; she's just reporting our updated understanding. To advocate a novel theory is to say, "I think maybe we should look into the ideas of String Theorists more. Their math seems to reconcile quantum mechanics with Newtonian physics. I'm intrigued and you should be too." Instead, the author is announcing findings. - "It has now become clear that Y" - "Specifically, Z appears to play an important role in A." A theory would be a more hypothetical construct of ideas. This author is just telling us biological stuff we've figured out about human anatomy.

  5. Weak Match: new approach3% picked this

    outline a new

    This is similar to (A). When it comes to present vs. outline, there's no clear winner. Both of them feel fine, for a passage that laid out a lot of facts about hormones and the body. They are both better than advocate, which sounds more like the author is trying to persuade us of something that we don't necessarily have to agree with. But when it comes to new information vs. new approach, which is the better match? "It has now become clear that other hormones can affect behavior. Specifically, peptide and steroid hormones appear to play an important role in the control of water and salt consumption." This sounds more like new info. There's no new approach described in that sentence.

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