1. Section 14.4 Sleep and Feeling Fit Slide 1 of 14 Objectives Describe why sleep is important for health. Explain how circadian rhythms influence the sleep patterns of teens. Section 14.4 Sleep and Feeling Fit

2. Section 14.4 Sleep and Feeling Fit Slide 2 of 14 Health Stats What trend does this graph reveal about teens and sleep? What factors do you think contribute to the sleeping habits of teens?

3. Section 14.4 Sleep and Feeling Fit Slide 3 of 14 During sleep, your muscles relax, your breathing and heart rate decrease, and your body temperature drops slightly. What Is Sleep? Although some people think of sleep as wasted time, it is actually just as important to the body as air, water, and food.

4. Section 14.4 Sleep and Feeling Fit Slide 4 of 14 Your brain sorts the day’s information. Learning and the storage of memories may occur. Benefits of Sleep The healing of body tissues occurs during sleep. Adequate sleep helps the immune system to function properly. Adequate sleep may help prevent some diseases.

5. Section 14.4 Sleep and Feeling Fit Slide 5 of 14 First, you enter non-rapid eye movement sleep (NREM). The Sleep Cycle As you pass through the four stages of NREM sleep, your body gradually reaches a state of deep relaxation. After the stages of NREM sleep, you enter rapid eye movement sleep (REM). During REM sleep, your eyes flicker rapidly behind closed eyelids, and there is a high level of brain activity. Your muscles are paralyzed during REM sleep, which prevents you from acting out your dreams.

6. Section 14.4 Sleep and Feeling Fit Slide 6 of 14 Lens Retina Blood vessels

7. Section 14.4 Sleep and Feeling Fit Slide 7 of 14 Insomnia refers to difficulties falling asleep or staying asleep. Insomnia can be caused by stress or some physical problems. Sleep Disorders Sleep apnea (AP nee uh) is a disorder in which a person stops breathing for short periods during sleep and then suddenly resumes breathing. Narcolepsy is a disorder in which a person experiences severe sleepiness during the day, or falls asleep suddenly.

8. Section 14.4 Sleep and Feeling Fit Slide 8 of 14 Circadian rhythm (sur KAY dee um) is the body’s internal system for regulating behavior patterns during a 24-hour cycle. Teens and Sleep Teens want to sleep later into the day and stay awake later at night than adults. Puberty affects the body’s circadian rhythm. Most teens need about nine hours of sleep each night.

9. Section 14.4 Sleep and Feeling Fit Slide 9 of 14 Teens and Sleep Go to bed and wake up at the same times each day, even on weekends. Avoid bright lights at night. After waking, expose yourself to bright light as soon as possible. Avoid caffeine and sugary foods after noon. Exercise regularly, but not right before bedtime. Don’t fall asleep with the television on. Avoid all-nighters, which disrupt your sleep patterns. If you nap, do not let your naps interfere with your regular sleep patterns. If you can’t fall asleep, get up and do something relaxing until you feel tired. Here are some tips to help you develop good sleep habits.

10. Section 14.4 Sleep and Feeling Fit Slide 10 of 14

11. Section 14.4 Sleep and Feeling Fit Slide 11 of 14 Click above to go online. For: More on teens and sleep

12. Section 14.4 Sleep and Feeling Fit Slide 12 of 14 Vocabulary insomniaA disorder in which a person has trouble falling asleep or staying asleep. sleep apneaA disorder in which a person stops breathing for short periods during sleep. narcolepsyA disorder in which a person experiences severe sleepiness during the day, or falls asleep suddenly. circadian rhythmThe body’s internal system that regulates behavior patterns during a 24-hour cycle.

13. Section 14.4 Sleep and Feeling Fit Slide 13 of 14 QuickTake Quiz Click to start quiz.

14. Section 14.4 Sleep and Feeling Fit Slide 14 of 14 Click above to go online. For: Chapter 14 self test

15. Section 14.4 Sleep and Feeling Fit Slide 15 of 14 End of Section 14.4 Click on this slide to end this presentation.