No jackass, the MCAT is a measure of your basic science foundation [are you purposely being obtuse or do you just not understand?]. I know it is a confusing concept, i.e., have a strong foundation in the basic sciences that allows you to actually understand the rationale for specific interventions in the context of the patient and their multiple disease processes, but just think how incredibly cool it would be if you actually knew the basis for your actions in the OR.
Now I know what you are saying, "But Josh, I already have a vast array of NANDA diagnoses and their subsequent nursing interventions at my fingertips. Do I really need to understand anything beyond that? I mean, I learned the basic classification and action of a drug, and also when to use it. Do I really need to know the mechanism of how and why?"
Actually Pete, you don't. Don't worry about filling your busy head with the actual rationales for your actions and let the anesthesiologists take the difficult cases.