The high produced by narcotics is due to the drug's interaction with which receptors?

The high produced by narcotics is due to the drug's interaction with which receptors?

• A. Blocking GABA activity
• B. Attaching to sites normally receptive to endorphins
• C. Flooding neurotransmitter synapses with dopamine
• D. Causing an increased release of serotonin

Answer: (B)

The high from narcotics comes from binding to the brain’s endogenous opioid receptors—receptors that normally respond to endorphins. When these drugs attach to those sites, they mimic natural endorphins, producing reward, analgesia, and euphoria. This receptor activation also reduces the activity of GABAergic neurons that normally keep dopamine in check, leading to higher dopamine release in the mesolimbic pathway and contributing to the rewarding feel. So the key idea is that narcotics unleash their effects by occupying endorphin-responding receptors, with increased dopamine as a downstream consequence, rather than acting primarily on dopamine or serotonin receptors.

The high from narcotics comes from binding to the brain’s endogenous opioid receptors—receptors that normally respond to endorphins. When these drugs attach to those sites, they mimic natural endorphins, producing reward, analgesia, and euphoria. This receptor activation also reduces the activity of GABAergic neurons that normally keep dopamine in check, leading to higher dopamine release in the mesolimbic pathway and contributing to the rewarding feel. So the key idea is that narcotics unleash their effects by occupying endorphin-responding receptors, with increased dopamine as a downstream consequence, rather than acting primarily on dopamine or serotonin receptors.