Don’t lose your progress!

We cover every section of the GMAT with in-depth lessons, 5000+ practice questions and realistic practice tests.

Up to 90+ points GMAT score improvement guarantee

The best guarantee you’ll find

Our Premium and Ultimate plans guarantee up to 90+ points score increase or your money back.

Master each section of the test

Comprehensive GMAT prep

We cover every section of the GMAT with in-depth lessons, 5000+ practice questions and realistic practice tests.

Schedule-free studying

Learn on the go

Study whenever and wherever you want with our iOS and Android mobile apps.

The most effective way to study

Personalized GMAT prep, just for you!

Adaptive learning technology focuses on your academic weaknesses.

Reading Comprehension: Inference Questions

Which of the following does the author suggest occurs when a mother rat gives birth?

Incorrect.

[[snippet]]

According to the passage, after birth oxytocin in mother rats does not drop but must be suppressed artificially, by introducing antagonists.

Nice work!

[[snippet]]

As the last sentence of the second paragraph indicates, when the injection of oxytocin antagonists, or blockers, ceased, the mother rats started behaving maternally. So we learn that when oxytocin is suppressed, maternal behavior is also suppressed, to return after oxytocin is no longer suppressed. From this we learn of the direct relationship between oxytocin and maternal behavior.

Since no other interventions (e.g. no oxytocin injections, or other additions of oxytocin) are described, we can infer that oxytocin was already present in the mother rat's bloodstream, but suppressed by the antagonists. Therefore, the mother rat must have produced the hormone herself and released it into her bloodstream.

Incorrect.

[[snippet]]

The passage tells us that scientists had to inject oxytocin antagonists into the blood of mother rats who had just given birth, which suggests that they are not naturally present.

Incorrect.

[[snippet]]

The passage does not mention vasopressin in connection with mother rats. Vasopressin is only mentioned in the third paragraph.

Incorrect.

[[snippet]]

There is no information in the passage that tells us that there are oxytocin antagonists in the bloodstream of a mother rat or in what amount. The passage only states that scientists injected mother rats with such antagonists.

Their normal amount of oxytocin drops significantly.
Oxytocin is released into the bloodstream.
Oxytocin antagonists are released into the bloodstream.
Vasopressin is released into the bloodstream.
The normal amount of oxytocin antagonists decreases drastically.