If Given an Opportunity to Release Cocaine or Morphine into Its

Multiple Choice

If given an opportunity to release cocaine or morphine into its bloodstream, e.g., by pressing a lever that delivers the drug intravenously, a nonhuman animal will typically do so, and when the drug is no longer delivered after many responses by the animal, it will stop lever pressing. However, if the animal is exposed to a stressor or sees or hears a cue that was originally presented when the drug was delivered, it will typically start lever pressing again. This phenomenon is referred to as

A) priming
B) sensitization
C) augmentation
D) tolerance