PSYC62H3 Chapter Notes - Chapter 7: Nicotiana Tabacum, Cellulose Acetate, Caffeine
Document Summary
Nicotine is the central psychoactive ingredient in tobacco. Tobacco consists of leaves from plants in the genus nicotiana of which the primary nicotinecontaining species grow in south and. The most popular plant used commercially is nicotiana tabacum, leadi(cid:374)g to the (cid:374)a(cid:373)e (cid:862)to(cid:271)a(cid:272)(cid:272)o. (cid:863) this pla(cid:374)t spe(cid:272)ies produ(cid:272)es greater a(cid:373)ou(cid:374)ts of (cid:374)i(cid:272)oti(cid:374)e tha(cid:374) other nicotiana species (saitoh, noma, & kawashima, 1985). Traditional forms of tobacco consisted of rolled tobacco leaves, and modern versions consist of cigars and cigarettes. When tobacco is chewed or smoked, small nicotinecontaining tobacco particles called tar and other tobacco chemicals enter the body. Cigarettes are the most commonly used tobacco product. A cigarette is composed of a tobacco blend rolled in a thin sheet of paper. Many cigarettes contain a filter of cellulose acetate that reduces the amount of tobacco tar inhaled. The tobacco portion of a regular cigarette is approximately 60 mm (2. 25 in. ) in length, and filtered cigarettes have a.
