Nicotine increases the levels of a dopamine in the brain which interacts with the brain’s reward system and motivates some people to use nicotine again and again, inspite of the possible risks to their health and well-being. True False

Nicotine activates neural mechanisms similar to those activated byMultiple Choicealcohol.heroin.cocaine.marijuana.

Nicotine affects the development of teenage brain circuits that control attention and learning, increasing the risks of mood disorders and permanent problems with impulse control. True False

The reinforcing effects of nicotine Group of answer choicesdepends on the dopamine pathway to the nucleus accumbens.is equal to amphetamine or cocaine in intensity.depends on the α4 subunit of the nicotinic receptor.involves the β2, α4, and α6 subunits of the nicotinic receptor.Both A and D

Which statement is false ? A Nicotine inhibits release of adrenaline and nor-adrenaline. B Smoking is associated with increased incidence of many cancers.  C Smoking increases carbon monoxide content in blood. D Smoking reduces concentration of haembound oxygen.

The chemical in cigarette smoke to which people often become addicted is called .