In one study, normal (sodium-replete) rats exposed to angiotensin II via infusion directly into the brain developed a strong sodium appetite which persisted for months.

In two European studies, rats exposed to pleasant odors during painful stimuli exhibited decreased pain-related behaviors, with some variation in response between the sexes.

Scientists say rats exposed to Schoenberg go insane.

Exposure to D5 is known to aggravate liver disorders and cause liver weight changes in rats exposed to it.

The highly reproducible results showed that conditioned rats exposed to the conditioned stimulus were immuno suppressed.

Scientific studies have demonstrated that male rats exposed to the pesticide before and shortly after birth can suffer effects like malformed genitalia.

Eventually, rats exposed to the lights and noise would respond with symptoms of an allergic attack even without ingesting the allergen.

Alterations to the morphology of the spine apparatus have also been observed in rats exposed to chronic levels of ethanol.

That news comes from lab tests done on rats exposed to a chemical that causes bladder cancer.