The onset of pain and the action of analgesic drug

The onset of pain and the action of analgesic drug

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Caption: The transmission of pain. Pain messages are transmitted through a peptide transmitter known as Substance P (yellow spheres) to spinal neurone cells in the spinal cord. At centre left a spinal neurone has been opened to show the relation between the Substance P and its receptor sites (yellow c-shaped). At bottom right a spinal interneurone is just visible with a short axon terminating on an axon of the spinal neurone. Here receptor sites (red c-shaped) of opiopeptins (red spheres) are found. Opiopeptins are contained in analgesic drugs and may alleviate pain because they inhibit the release of the Substance P.

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Keywords: analgesic drug, anatomy, artwork, cells, human body, journey, journeying, journeys, nerve cell, nervous, neurone, opiopeptins, pain, pain mechanism, pain receptor, pain relief drug, pain transmission, spinal, spinal neurone, substance p, system, transmission, travel, travelling, travels

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