Question

which of the following substances found in tobacco smoke stimulates the brain?
a acetone
b toluene
c nicotine
d ammonia
please select the best answer from the choices provided

Explanation:

Nicotine is a highly addictive substance in tobacco smoke that stimulates the brain by binding to nicotinic acetylcholine receptors, leading to the release of neurotransmitters like dopamine. Acetone is a solvent, toluene is an organic compound (used in paints etc.), and ammonia is a gas - none of these have the stimulating effect on the brain like nicotine.

Answer:

C. nicotine