Did you know that stress be healthy？ Too muchstress， though， lead to problems such as illness ordepression. Experts find out what causes stress and de? pression， and ways to cope with ge — good or bad — is stressful. Whetherit’ s harmful depends on each person’ s individualpersonality， their gehe support of the peoplearound them， their enviro， and how they havelearnt to cope with ge. Some people toleratemore stress than others， but too much stress over a longperiod of time cause ao bee physically illor ing StressBig ges in hormone levels cause major stress，which is why your teenage years be scary. Not onlydoes your body ge size and shape， but your mood swing from “ top of the world” on e mio feelingsad the he teenage body fights hard to stay healthy butstaying up late， eating junk food， drinking alcohol and**oking affect your body’ s hormone levels， whi make you sid is possible to maress by looking after our? selves and seeking help when necessary. It helps to eata balanced diet with lots of fresh fruits aab***，co**lex carbohydrates ， protein and a **aller amountof fat. It also helps to avoid alcohol， cigarettes， drugsand caffeine. Another way to maress is to do ex? ercise that you enjoy for 20 to 30 mihree times aweek， to keep fit. Doing something relaxing also helps，such as tai－chi a， aing plenty of help yourself get on top of things by learn? ing problem －solving strategies that help you to work outsolutions to your problems. Another way to relieve stressis to talk to your friends or f***ly members about s for survivalEveryoress response in their lives. Itkeeps us healthy， awake， alert and active. Without thestress of hunger we wouldn’ t eat. Without the stress ofpain， we wouldn’ t knoere injured. Our bodiesreact when they experieress， whether it is causedby an emergency or a slow buildup of many there’ s an emergency， your ***in activatesa relay of hormones （ chemical messengers） that are re? leased from the hypothalamus， pituitary gland and ad? renal glands. The adrenal glands produce the hormonesadrenalin， noradrenalin and cortisol .Adrenalin and noradrenalin increase the amount ofoxygen available to the musc***. That’ s why your heartstarts to pound when you’ re nervous or scared. Nora? drenalin regulates energy levels， helping you to get upin the m and sleep at night. Cortisol protects thebody from stress by helping it to heal cal Imbalahe body’ s natural stress response is perfeergencies but not for long － term stress and depres? ly high levels of adrenalin cause heartdisease. High levels of cortisol reduce theprodu of another i**ortant chemical calledserotonin. This cause problems with your immuem， which mean you get more coughs andcolds. Serotonin affects sleep patterns， which is why toomuch stress lead to sleeping er “ happy ” chemical called dop***rols our ability to feel pleasure and pain. When do? p***ne levels are low， the body produces lower levels ofendorphins （ a natural painkiller） ， making the personfeel like the world is a dark and unhappy ment for Depressioress or depressios out of hand， profes? sionals help. Doctors normally prescribe talkingtherapy； anti － depressants gradually balahechemical levels that affect the ***in and nervous ssion is on and it ’ s curable. Ifsomeone you know is depressed， be a good friend andehem to see a doctor.热词空间depressed a. 消沉的； 萧条的carbohydrate n. 糖类； 含碳水化合物的食物caffeine n. 咖啡硷； 咖啡因； 茶硷（ xìngfèn剂）yoga n. 瑜伽emergen. 紧急情况， 不测事件， 非常时刻hypothalamus n. 丘脑下部imbalan. 不平衡， 不均衡painkiller n. 止痛yào （本章完）