Unit 1 Section Ⅰ Starting out & Understanding ideas（课件PPT）- 2022-2023学年高二新教材英语选择性必修第一册【勤径学升·同步练测】（外研版）

单击此处添加文本具体内容 UNIT 1　Laugh out loud! Section Ⅰ　Starting out & Understanding ideas The benefits of smiling and laughing 1.Neurotransmitters(神经递质) called endorphins(内啡肽) are released when you smile. [对应学生用书第1页] Section Ⅰ　Starting out & Understanding ideas These are triggered by the movements of the muscles in your face,which is interpreted by your brain,which in turn releases these chemicals.Endorphins are responsible for making us feel happy,and they also help lower stress levels.The more we stimulate our brain to release this chemical,the more often we feel happier and relaxed. 2.Endorphins make us feel happier and less stressed. They also act as the body’s natural pain killers.For sufferers of chronic pain,laughing and smiling can be very effective in pain management. Section Ⅰ　Starting out & Understanding ideas 3.While the release of endorphins is increased,the stress hormone cortisol(激素皮质醇) is reduced. Cortisol is more active when we feel stressed or anxious and contributes to the unpleasant feelings we experience,and by lowering it we can reduce these negative feelings. Section Ⅰ　Starting out & Understanding ideas 4.Laughing expands the lungs,stretches the muscles in the body and stimulates homeostasis(体内平衡). This exercises the body,replenishing the cells from a lungful of oxygen and gaining all the benefits of exercising the body. 5.A good laugh can be an effective way to release emotions. A good laugh can help you release emotions,especially those emotions that you might bottle up inside.Everything looks that little bit better after a good laugh and life can be seen from a more positive perspective.Smiling and laughing have positive social influences as well. Section Ⅰ　Starting out & Understanding ideas 6.Smiling is an attractive expression,which is more likely to draw people to you rather than push them away. Smiling makes you appear more approachable.Interaction with others is easier and more enjoyable when smiles and laughs are shared,and these behaviours a