Stimulants: Increase the actions regulated by the nervous system: –Heart rate –Blood pressure –Breathing rate Also increase the release of neurotransmitters at some synapses in the brain!
Effects wear off, brain’s supply of neurotransmitters has been depleted causing fatigue and depression
Examples: Cocaine- cause sudden release of dopamine producing intense feelings of pleasure and satisfaction –Extremely addicting Another form is “Crack”
Depressants: Decrease the rate of functions regulated by the brain: –Slow down heart rate and breathing rate –Lower blood pressure –Relax muscles –Relieve tension Comes individual and they rely on the drug to relieve the anxieties of everyday life.
Examples: Opiates – pain-killing drugs Marijuana: –Bad for lungs more so than tobacco smoke –Loss of memory –Inability to concentrate –In males- decreased levels of testosterone Alcohol: –Slows down rate at which CNS functions!