| 1. | "Naltrexone simply blocks the opioid receptors so the endorphines can't get there.
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| 2. | Menthol's analgesic properties are mediated through a selective activation of ?-opioid receptors.
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| 3. | These endorphins likely operate on the same opioid receptors that naloxone blocks.
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| 4. | Levorphanol is 6-8 times as potent as morphine at the mu-opioid receptor.
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| 5. | Eletriptan has no significant affinity or pharmacological activity at muscarinic; or opioid receptors.
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| 6. | Descending pathways also activate opioid receptor-containing parts of the spinal cord.
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| 7. | This points to a role for opioid receptors in mating behaviors.
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| 8. | More recent investigations, however, discovered opioid receptors on peripheral sensory neurons.
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| 9. | In vertebrates, neuromodulators that moderate pain by interacting with opioid receptors.
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| 10. | Loperamide is a ?-opioid receptor agonist that works in the intestines.
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