https://padlet.com/apizano1/xog5qkq4v7xv Nicotine is an alkaloid which constitutes 0.6-3.0% of the dry weight of tobacco. It acts both as a stimulant and a relaxant. Initially, nicotine causes the release of adrenaline and may block the release of insulin and increase metabolic rate. Dopamine is also released which increases feelings of well-being. However, tobacco smoking is linked to increasing incidence of many diseases, including various cancers and circulatory and respiratory diseases. en-us 2017-06-09 23:37:26 UTC 2017-07-31 02:25:45 UTC hello@padlet.com apizano1 https://padlet.com/apizano1/xog5qkq4v7xv/wish/178740877 2017-07-15 01:02:43 UTC https://padlet.com/apizano1/xog5qkq4v7xv/wish/178740877