psychoactive plants Flashcards
affect functioning of nerve and brain cells
neurotoxins
kill cells, selectively or generally
Cytotoxins
attacks organs
organotoxins
plants benefit from producing secondary compounds that are toxic to potential herbivores
Any biologically produced chemical that does harm to the body; poison
Toxin
Human produced “toxins”
Toxicants
Phytotoxin, Mycotoxin, and Microbial toxin
Biotoxins
Toxin produced by a plant
Phytotoxin
toxin produced by a fungus
Mycotoxin
Toxin produced by bacteria, cyanobacteria, or other microbes
Microbial toxin
Level of damage depends on…
type of toxin, how long we are exposed, how frequently we are exposed, how much we are exposed to, and the route of exposure
Routes of exposures
Absorbed through skin, breathing, eating, puncture
Ability of a substance to cause a harmful effect
Toxicity
Amount of something you are exposed to or come in contact with
Dose
Relationship between toxicity and dose
Indirect relationship (one goes up, other goes down)
Toxicity is low, dose is low
Low risk
Toxicity is low, dose is high
Moderate risk
Toxicity is high, dose is low
Moderate risk
Toxicity is high, dose is high
High risk
Single dose (mg/kg of body weight) that kills 50% of a population within two weeks
LD50
Excite and enhance alertness and activity
Stimulants
Examples of stimulants
Caffeine, cocaine
Alter perception, thought, mood, and may induce dream-like states
Hallucinogens
Examples of hallucinogens
LSD, peyote, psilocybin, marijuana
Dull awareness, reduce performance, and may induce sleep or trancelike states
Depressants
Examples off depressants
Opium (morphine and heroin)
The desire to re-experience the drug induced pleasure
Psychological dependence
The body needs the drug to avoid unpleasant withdrawal symptoms
Physical dependence
The need for ever greater doses to achieve the same effect
Tolerance
A central nervous system depressant, any psychoactive chemical thought to be dangerously addictive
Narcotic
All addictive drugs affect this pathway, cocaine keeps dopamine in the Nucleus Accumbens, opiates increase dopamine production, addictive drugs mess with dopamine
Dopamine’s mesolymbic pathway
Examples of opium and opiates
Morphine and Codeine
Used medicinally to control pain, depressed the area of the brain involved in perceiving pain by mimicking endorphins
Morphine
Much less powerful than morphine, reduces pain and coughing
Codeine
Used as a non-addictive pain killer and cough suppressant until 1917
Heroin