Unit 1 Section Ⅰ Starting out&Understanding ideas-【勤径学升】2024-2025学年高中英语选择性必修第一册同步练测（外研版2019）

UNIT 1 Laugh out loud! 4441044144里440tt414000444441dgt0040044444040000t00g 美文欣赏·话题连接 44+++44 4444444444044444404440144t014444 177于5下1无节511无无1下7无节发节节1青有1有有7无无无节月节771等71无无下FF下 1有1月有77下男1无71节男1771月年1无无无下下发月月节节节节7月无无发节节无节节节1有7无 The benefits of smiling and laughing L.Neurotransmitters(神经递质)called endorphins(内啡肽)are released when you smile. 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. 3.While the release of endorphins is increased,the stress hormone cortisol(撤素皮质醇)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. 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. 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 are contagious,making others feel better too,and make