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Opioid receptor: Quiz


Question 1: Opioid receptors are a group of ________ with opioids as ligands.
Olfactory receptorReceptor (biochemistry)Membrane receptorG protein-coupled receptor

Question 2: The opioid receptors are ~40% identical to ________ receptors (SSTRs).
Gonadotropin-releasing hormoneCorticotropin-releasing hormoneVasopressinSomatostatin

Question 3: It is thought that the ________ binds to the third intracellular loop of the opioid receptors.
G proteinGTPasePlasma membrane Ca2+ ATPaseRas (protein)

Question 4: Research has so far failed to identify the genetic evidence of the subtypes, and it is thought that they arise from ________ of cloned receptor types.
Posttranslational modificationAmino acidPhosphorylationProtein biosynthesis

Question 5: The endogenous opioids are ________, enkephalins, endorphins, endomorphins and nociceptin.

Question 6: By the mid-1960s, it had become apparent from pharmacologic studies that ________ drugs were likely to exert their actions at specific receptor sites, and that there were likely to be multiple such sites.

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