Drugs

•Our brain is protected by a layer of capillaries called the blood-brain barrier; drugs that are small enough to pass through are called psychoactive drugs
Drugs are either,

• Agonists
• Antagonists
• Reuptake inhibitors

If a drug is used often, a tolerance is created for the drug.

Thus you need more of the drug to feel the same effect.

If you stop using a drug you can develop withdrawal symptoms

Stimulants:

• Speed up body processes
• More powerful ones (like cocaine) give people feelings of invincibility

Depressants:

• Slows down body processes
• Alcohol
• more than 86 billion dollars are spent annually on alcoholic beverages
• involved in 60% of ALL crimes
• involved in over 70% of sexually related crimes
• Anxiolytics (barbiturates and tranquilizers)
• Opiates:
• Has a depressive and hallucinogenic quality
• Agonist for endorphins
• Derived from poppy plant
• Morphine, heroin, methadone, and codeine, all these drugs cross the placental barrier to teratogens

Examples of Memory, Learning, and Sleep

Short Term and Long Term Memory

 Classical Conditioning

                                                Sleep Disorders