Susan's brain: The science of addiction

Learn how opioid receptors regulate pain signals, how the body releases natural painkillers called endorphins, and how prescription opioid analgesics can lead to dependency and a cycle of addiction. From our free online course, “The Opioid Crisis in America”: https://www.edx.org/course/opioid-cri... — Subscribe to our channel:    / @harvardonline   — Sign up for emails about new courses: https://harvardx.link/email — HarvardX courses on edX: https://www.edx.org/school/harvardx — Harvard University's online courses: https://online-learning.harvard.edu/ HarvardX empowers the faculty of Harvard University to create high-quality online courses in subjects ranging from computer science to history, education, and religion.