Knowra Nicotine Nicotine Nicotine is a naturally occurring alkaloid found mainly in tobacco plants. It activates nicotinic acetylcholine receptors and can produce strong dependence.
Nicotinic acetylcholine receptor : A ligand-gated ion channel activated by acetylcholine and nicotine. Nicotine binds these receptors, triggering ion flow and changes in neuronal activity.
Tobacco smoking : The inhalation of smoke produced by burning tobacco. Smoking delivers nicotine rapidly to the brain, while combustion creates many additional toxicants.
Nicotiana tabacum : A cultivated tobacco species whose leaves are a major commercial source of nicotine. Its leaves contain nicotine that accumulates in substantial concentrations.
Tobacco control : Public-health policies and interventions intended to reduce tobacco use and its harms. Nicotine dependence is a central challenge addressed by tobacco-control measures.
Dopamine : A neurotransmitter involved in movement, motivation, reward, and learning. Nicotine indirectly increases dopamine signaling in reward circuits, reinforcing repeated use.
Electronic cigarette : A battery-powered device that heats liquid into an inhalable aerosol. Many devices deliver nicotine without burning tobacco, though their aerosols are not harmless.
Nicotiana rustica : A tobacco species generally containing more nicotine in its leaves than common cultivated tobacco. Its comparatively nicotine-rich leaves show how content varies across tobacco species.
Smoking cessation : The process of stopping tobacco smoking, often with behavioral or medical support. Managing nicotine craving and withdrawal is a major part of quitting smoking.
Mesolimbic pathway : A brain circuit connecting the ventral tegmental area with regions including the nucleus accumbens. Nicotine recruits this circuit to generate reward and strengthen drug-associated learning.
Nicotine replacement therapy : Medicines that supply nicotine without tobacco smoke to support smoking cessation. Patches, gum, and other forms reduce withdrawal while separating nicotine delivery from combustion.
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