Khan Academy Static

6B: A drug is any chemical substance with a biological effect on an organism. Unfortunately, some people have addictions to drugs - 18.1% of all US adults smoke cigarettes, which have disastrous consequences on our health. You will come to appreciate the effects of drugs on our human physiology as we explore the mechanisms of psychoactive drugs such as depressants, opiates, stimulants, and hallucinogens.

15612_Psychoactive_drugs_Stimulants.html

15619_Treatments_and_triggers_for_drug_dependence.html

15616_Reward_pathway_in_the_brain.html

15618_Substance_use_disorders.html

15613_Psychoactive_drugs_Hallucinogens.html

15610_Overview_of_psychoactive_drugs.html

15615_Routes_of_drug_entry.html

15614_Drug_dependence_and_homeostasis.html

15611_Psychoactive_drugs_Depressants_and_opiates.html

15617_Tolerance_and_withdrawal.html