In the presence of naloxone , a higher concentration of morphine is required to elicit full pain relief . Naloxone by it self has no effect . Which of the following is correct regarding these medications ?
A) Naloxone is a competitive antagonist .
B) Morphine is a full agonist , and naloxone is a partial agonist .
C) Morphine is less efficacious than is naloxone .
D) Morphine is less potent than is naloxone .
E) Naloxone is a noncompetitive antagonist .
Correct Answer:
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