PSY340H5 Lecture Notes - Lecture 8: Bleeding, Weaning, Alprazolam
Document Summary
Substance dependence: caffeine is a stimulus, it makes you go faster, improves performance which is, repeated self-administration can lead to: enjoyable now you depend on it. Epidemiology: lifetime prevalence = 15, men 5x more likely, dopamine reward pathways. How drugs enter the body: orally. Some abusers look schizophrenic they do crazy things, speak gibberish. Easy but inefficient has to travel through digestive system, then into blood stream, then to brain. More efficient injected straight into blood stream then goes to brain. Intravenous (iv) injection turn drug into vapour, and inhale lungs connected to blood system, any substances that one breathes in quickly goes into the bloodstream: injection, inhalation, absorption less common method b/c it is not easy. Put it on the body and absorb it into the body via diffusion. Four major categories: stimulants increase the function of the nervous system i. e. cocaine, depressants. Decrease the function of the nervous system.
