这个词是什么意思？
Nicotine is highly toxic alkaloid. It is the prototypical agonist at nicotinic cholinergic receptors where it dramatically stimulates neurons and ultimately blocks synaptic transmission. Nicotine is also important medically because of its presence in tobacco smoke.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D009538 · MeSH 2026。
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