For example, a rat freezing for 18 s during the 30-s CS would receive a freezing score of 60%.
For example, rat and human esophagi don't have exactly the same types of muscles and structure.
For example, rat skin can metabolize PCB 136 in vitro.
For example, rat miR-134 is localized to dendrites in the hippocampus and negatively regulates the size of dendritic spines.
Similar patterns could be found between cytotoxicity and other in vivo toxicity end points, for example, rat chronic LOAEL and rat chronic NOAEL.
For example, rat liver and rat adipose had 2.7 times more significant genes in common than expected by chance (observed = 98, expected = 36, q = 2.01-20, Figure 2B).
For example, rat feeds produced from organic crops had lower concentrations of proteins and Cd, but higher concentrations of polyphenols and the carotenoid lutein.
In some animal species, as, for example, the rat, that do not develop arteriosclerosis, age changes in the heart and blood vessels can be identified.
When a rat is exposed to a sound followed by a nasty shock, for example, the rat quickly learns to associate the sound with pain, a reinforcement carried out by the amygdala, an almond-shaped structure in the brain's limbic system, the seat of emotions and emotional memories.
Gestational days 18-20 are a time of tremendous growth; for example, one rat strain experiences a nearly tripling of fetal weight during this interval [28].
