PSYCHOLOGY OF EMOTIONS

Detailed explanation-1: -Enkephalins and endorphins are opioid receptor agonists (3, 4, 14, 15), and their activity is very much dependent on receptor mediation.

Detailed explanation-2: -Small peptide neurotransmitters, called enkephalins and endorphins, are the natural inhibitors of pain signals. They bind to opioid receptors in pain-signalling cells of the nervous system. Opioids mimic this action, also causing opioid receptors to slow down the pain response.

Detailed explanation-3: -Full agonist opioids activate the opioid receptors in the brain fully resulting in the full opioid effect. Examples of full agonists are heroin, oxycodone, methadone, hydrocodone, morphine, opium and others.

Detailed explanation-4: -Morphine appears to mimic the body’s endorphins that are responsible for analgesia (reducing pain), causing sleepiness, and feelings of pleasure. Morphine is a phenanthrene opioid receptor agonist which binds to and activates opioid receptors in the central nervous system.