How does morphine work?

Could someone please explain to me how morphine works? Thank you very much for your time!
Answers:
Morphine, no matter how it is administered, makes its road to the brain and elsewhere - anywhere your blood supply goes. There, morphine interacts with specialized opiate receptors. These are proteins in the membrane of cell that when activated, direct the cell to do something. Opiate receptors in the brain, when contacted my morphine will cause change in brain neurons controlling various biobehaviors; all of the effects (pain nouns, sleepiness, etc.) are due to the interaction of morphine with brain receptors for opiates. There are opiate receptors in areas outside the brain as well. Source(s): I am a forensic psychopharmacologist trained contained by neuropharmacology, neuroscience, etc.

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