Morphine,heroin,and codeine are effective because they imitate the action of our natural ____.
A)excitatory neurotransmitters
B)tryptamines
C)endorphins
D)catecholamines

Question

Quizplus · Accepted Answer

Morphine, heroin, and codeine are all opioids, which bind to the same receptors in the brain as endorphins. Endorphins are natural pain-relieving chemicals produced by the body, and opioids mimic their effects.

Morphine,heroin,and Codeine Are Effective Because They Imitate the Action of Our