Opiates such as morphine and codeine both contain molecules that are similar to endorphins, the body's natural painkillers. Opiates and morphine bind to receptor sites that are keyed to endorphins and trigger pain-reducing responses. Given these
Characteristics, both codeine and morphine would be classified as:

Question

Quizplus · Accepted Answer

Codeine and morphine are classified as agonists because they bind to the same receptors as endorphins and mimic their pain-relieving effects.

Opiates Such as Morphine and Codeine Both Contain Molecules That