Question

which statement describes tobacco?
it is classified as an addictive drug.
it decreases heart rate and blood pressure.
there is a low risk of developing stroke.
it causes the level of dopamine in the brain to decrease.

Explanation:

Tobacco contains nicotine, which is addictive. Nicotine affects the brain's reward system. When a person smokes or uses tobacco products, nicotine enters the bloodstream and reaches the brain. It binds to nicotine - acetylcholine receptors, leading to the release of dopamine (not a decrease). This dopamine release is part of what makes tobacco addictive.
Tobacco use actually increases heart rate and blood pressure due to the effects of nicotine and other chemicals. Also, tobacco use is a significant risk factor for stroke as it can damage blood vessels and increase the likelihood of blood clots.

Answer:

It is classified as an addictive drug.