Use the following to answer questions:
Match the substance in each question with the MOST appropriate alternative from the list below.
-met - enkephalin ___
A)Viagra
B)Alzheimer's disease
C)Parkinson's disease
D)opium

Question

Quizplus · Accepted Answer

Met-enkephalin is an endogenous opioid peptide that is released during stress and acts as a natural painkiller. Opium is a narcotic drug that contains opioids and has been used for pain relief for thousands of years. While Viagra is used to treat erectile dysfunction, Alzheimer's disease and Parkinson's disease are neurodegenerative disorders that do not involve opioids.

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