5. ____________________ average less than one cigarette per day and smoke mainly in the company of
others.
6. Smoking reduces blood flow to the penis, which can cause ______________________.
7. Women who smoke may develop a bone-weakening condition called ____________________.
8. Lung cancer claims more women’s lives than ____________________ cancer.
9. ____________________ is an herb than can be smoked or chewed and directly affects the brain.
10. Tobacco smoke contains approximately ____________________ compounds.
11. ____________________ is a colorless, oily compound that is poisonous in concentrated amounts.
12. Inhaling shallow puffs of a cigarette appears to increase ____________________.
13. On average, smokers are ____________________ times more likely to have a heart attack.
ANS: