1- nicotine acts upon the nicotine receptors in the CNS and NS
2- acetylcholine is stimulated and then its receptors are disabled
3- increases levels of norepinephrine
4-increased endorphin levels leads to anxiety
effects
long term
the lungs become coated in tar which reduces efficiency
heart problems
short term
relaxation
mild euphoria
improves attention and problem solving skills
improves memory
decreases anxiety
Withdrawl
desire for oral gratification
anxiety
poor concentration
memory problems
depression
sleeping problems
sleeping problems
increased appetite
Tolerance
quickly leads to tolerance. Smokers will need more nicotine to get the effects, smokers usually start to increase their use of cigarettes in a short time
Dependency
Physical
is addictive and the brain changes to the extent that nicotine is needed for normal functioning
psychological
the individual will become used to the oral stimulation and without it would need to substitute something else e.g eating