2. Tolerance: Repeated administrations of a drug lead to a decreased drug effect. Craving: After repeated drug administration there is strong desire for it. Withdrawal: Lack of drug to an addicted person causes a variety of unpleasant symptoms. All addictive drugs develop addiction in the same way. Addiction
3. Morphine administration • Euphoria • Blocking pain • Hypothermia • Decreased blood pressure • Warm skin • Drying of secretions Same response in animals as in humans Morphine is an opiate and is a refined version of heroin
5. Pavlovian Learning Unconditional Stimulus Unconditional Response Food Salivation Conditional Stimulus Conditional Response Bell Salivation The conditional response helps to maintain homeostasis
6. Pavlovian Drug Learning Unconditional Stimulus Unconditional Response Drug Drug response Conditional Stimulus Conditional Response Drug Administration Ritual Compensatory Response
7. Pavlovian Drug Learning Unconditional Stimulus Unconditional Response Drug Drug response Conditional Stimulus Conditional Response Drug Administration Ritual Compensatory Response The conditional response helps to maintain homeostasis