Nicotine acts in the brain by
A)increasing serotonin reuptake.
B)enhancing GABA's inhibitory effects.
C)reducing blood flow to the cerebral cortex.
D)first stimulating and then blocking cholinergic receptors.

Question

Quizplus · Accepted Answer

Nicotine first stimulates and then blocks cholinergic receptors in the brain. Cholinergic receptors are responsible for the release of acetylcholine, a neurotransmitter involved in cognitive processes such as learning, memory, and attention. When nicotine binds to these receptors, it increases the release of dopamine, serotonin, and norepinephrine, which are other neurotransmitters involved in the reward system and mood regulation. However, long-term use of nicotine can lead to desensitization and downregulation of cholinergic receptors, which can result in addiction and withdrawal symptoms.

Nicotine Acts in the Brain by