Which of the following best describes how opioid drugs, like oxycodone, work in the body?
1) When something good happens, endorphins are released from the Ventral Tegmental Area of the brain. Opioids stop this process from happening.
2) Opioids share a chemical similarity with our own endorphins which allows them to bind to opioid receptors.
3) When something good happens, dopamine is released from the Ventral Tegmental Area of the brain. Dopamine neurons are covered with opioid receptors.
4) Opioids share a chemical similarity with our own dopamine which allows them to bind to dopamine receptors.