Do old people shrink as they age?

　　Yes and no.Many people do get shorter as they age.But，when they do，it isn't because they're shrinking all over.They simply lose height as their spine(脊柱) becomes shorter and more curved due to disuse and the effects of gravity(重力)．Many (but not all) men and women do lose height as they get older.Men lose an average of 3­4 cm in height as they age，while women may lose 5 cm or more.If you live to be 200 years old，would you keep shrinking till you were，like 60 cm tall，like a little boy again？No，because old people don't really shrink！It is not that they are growing backwards—their legs，arms and backbones getting shorter.When they do get shorter，it's because the spine has shortened a little.Or，more often，become more bent and curved.

　　Why does spinning make you dizzy(眩晕的)?

　　Because your brain gets confused between what you're seeing and what you're feeling.The brain senses that you're spinning using special gravity­and­motion­sensing organs in your inner ear，which work together with your eyes to keep your vision and balance stable.But，when you suddenly stop spinning the system goes out of control，and your brain thinks you're moving while you're not!

　　Where do feelings and emotions come from?

　　Mostly from an ancient part of the brain called the limbic system.All mammals have this brain area—from mice to dogs，cats，and humans.So all mammals feel basic emotions like fear，pain and pleasure.But since human feelings also involve other，newer bits of the brain，we feel more complex emotions than any other animal on the planet.

【2017届湖北省黄冈市高考英语阅读理解二轮精练：3（含解析）】相关文章：

★ 【北师大版】2014届高考英语一轮复习指导课时作业：Unit 3 A卷 Word版含解析

★ 浙江省湖州市2014高考英语阅读理解一轮（暑假）精炼（11）含答案

★ 2017届高考英语二轮复习大题冲关秘籍阅读理解七选五：创新押题（含解析）

★ 2017届高考英语二轮复习课时训练：12（含解析）

★ 重庆市2014高考英语阅读理解一轮（精品）训练题（19）附答案

★ 【北师大版】2014届高考英语一轮复习指导课时作业：Unit 7 A卷 Word版含解析

★ 湖南省岳阳市2014高考英语一轮单项选择训练题（15）及答案

★ 2014届高考英语一轮复习选修8参考答案（外研版）

★ 【课堂新坐标】2017届高考英语（通用版）二轮复习短文改错专题训练：考法3 行文逻辑错误（含解析）

★ 2017高考四川省广安市英语阅读理解一轮系列训练：4（含解析）