Because they have similar chemical structures, morphine and other narcotics are able to lock into receptor sites for ________.
A) dopamine
B) serotonin
C) endorphins
D) acetylcholine

Question

Quizplus · Accepted Answer

Morphine and other narcotics are able to lock into receptor sites for endorphins because they have a similar chemical structure. Endorphins are natural painkillers produced by the body and play a role in regulating pain. Morphine and other narcotics mimic the effects of endorphins by attaching to the same receptor sites in the brain and spinal cord, blocking pain signals and producing a sense of euphoria. This is why they are often used as painkillers in medical settings.

Because They Have Similar Chemical Structures, Morphine and Other Narcotics