Question

dont understand the diagram

31. Nicotine is an addictive substance due, in part, to its ability to bind_. _found on (A) VEGF receptors, endothelial cells (C) Wnt receptors, tumor cells (B) neurotransmitter receptors, brain cells (D) acetylcholine receptors, lung cells

Answer 1

Nicotine is an addictive because it produces dopamine by binding with neurotransmitter receptors so that can found in brain cells. In case of nicotine addiction, nicotine helps to release dopamine gives some pleasure .

Answer: B

Nicotine absorbed by blood , pumped into various body parts also went to brain. It then binds with neurotransmitter receptors and stimulate production of dopamine which gives pleasure. Thus , frequent use causes addiction.