The divide between what is sensed and what is not is known as the

The feelings of euphoria associated with cocaine usage continue until:

A. the brain's supply of serotonin, norepinephrine, and dopamine drops off. B. the cocaine is metabolized by the body. C. the brain shuts down. D. the cocaine passes through the bloodstream.

The main reason health care professionals are often reluctant to prescribe opioids for pain management is that

A) their use often leads to problematic or illegal behaviors. B) they are the most commonly abused prescription drug. C) increased dosages tend to suppress the respiratory system. D) long-term use actually increases pain sensitivity.