Most likely, you have an outdated browser. It is highly recommended to upgrade it.
Please consider these modern browsers: Mozilla Firefox, Google Chrome, Microsoft Internet Explorer, Apple Safari.
Which of the following opioid receptors is responsible for hallucinations?
A pure memorization question, but these will come up, especially about opioid receptor subtypes. Here's a handy chart:reference: https://en.wikipedia.org/wiki/Opioid_receptor