A physician is explaining to the client the role of endogenous opioids in the transmission of pain. What happens when endogenous opioids are released?
A) They bind to sites on the nerve cell's membrane.
B) They react with acetylcholine and serotonin.
C) They occupy cell receptors for neurotransmitters.
D) They block glutamate receptors and peptides.
A
Feedback:
When endogenous opioids are released, they are thought to bind to sites on the nerve cell's membrane that block the transmission of pain-conducting neurotransmitters such as substance P and prostaglandins. Endogenous opioids do not occupy cell receptors for neurotransmitters like acetylcholine and serotonin, but efforts are being made to develop pain-modulating drugs that will do so and will also block glutamate receptors and peptides.
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Fill in the blank(s) with the appropriate word(s).