x Unit 4 Understanding and Avoiding Hazardous Substances . . . . . . . . . . . . . . 238 Chapter 8 Tobacco . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240 Lesson 8.1 Tobacco and Your Health . . . . . . . . . . . . 242 Lesson 8.2 Understanding Tobacco Use . . . . . . . . . 250 Lesson 8.3 Quitting and Preventing Tobacco Use . . . 258 Chapter 8 Review and Assessment . . . . . . . . . . . . . 267 Chapter 9 Alcohol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270 Lesson 9.1 The Effects of Alcohol . . . . . . . . . . . . . . . 272 Lesson 9.2 Preventing and Treating Alcohol-Use Disorders . . . . . . . . . . . . 284 Chapter 9 Review and Assessment . . . . . . . . . . . . . 293 Chapter 10 Medications and Drugs . . . . . . . . . . . . . . . . . . . . . . . . . . 296 Lesson 10.1 Medications . . . . . . . . . . . . . . . . . . . . . . . . 298 Lesson 10.2 Illegal Drugs . . . . . . . . . . . . . . . . . . . . . . . . 306 Lesson 10.3 Preventing and Treating Drug Abuse and Addiction . . . . . . . . . . . . . 318 Chapter 10 Review and Assessment . . . . . . . . . . . . . 327 Unit 5 Protecting Your Physical Health and Safety . . . . . . . . . . . . . . . . . . . . . 330 Chapter 11 Understanding and Preventing Diseases . . . . . . . . 332 Lesson 11.1 Communicable Diseases . . . . . . . . . . . . . 334 Lesson 11.2 Sexually Transmitted Infections (STIs) . . . 341 Lesson 11.3 HIV/AIDS . . . . . . . . . . . . . . . . . . . . . . . . . . . 350 Lesson 11.4 Noncommunicable Diseases . . . . . . . . . 357