AP PSYCHOLOGY

Detailed explanation-1: -Nicotine is a dangerous and highly addictive chemical. It can cause an increase in blood pressure, heart rate, flow of blood to the heart and a narrowing of the arteries (vessels that carry blood). Nicotine may also contribute to the hardening of the arterial walls, which in turn, may lead to a heart attack.

Detailed explanation-2: -The risk of CVD increases with the number of cigarettes smoked per day, and when smoking continues for many years. Smoking cigarettes with lower levels of tar or nicotine does not reduce the risk for cardiovascular disease. Exposure to secondhand smoke causes heart disease in nonsmokers.

Detailed explanation-3: -Nicotine decreases the tumor suppressor CHK2. This may allow nicotine to overcome one of the body’s natural defenses against cancer. Nicotine can abnormally speed up the growth of new cells. This has been shown in tumor cells in the breast, colon, and lung.

Detailed explanation-4: -In addition, nicotine might also contribute to the hardening of your artery walls. Nicotine can essentially directly affect your cardiovascular system and the way your heart functions. This can eventually lead you to have a heart attack.

Detailed explanation-5: -Nicotine on direct application in humans causes irritation and burning sensation in the mouth and throat, increased salivation, nausea, abdominal pain, vomiting and diarrhea. [17] Gastrointestinal effects are less severe but can occur even after cutaneous and respiratory exposure.