Assertion: cigarette's nicotine | /r/HasAspect | effect
Facets:
Source sentences:
text: The adolescent brain is still developing, and nicotine has effects on the brain’s reward system and brain regions involved in emotional and cognitive functions.70 Research suggests that the nicotine-related changes to these areas of the brain during adolescence may perpetuate continued tobacco use into adulthood.71
text: Some evidence for this hypothesis has been provided in animal studies and in cell cultures, showing that nicotine has several effects that could deem it a risk factor for cardiovascular disease, but research on humans hasn’t observed this effect.