Do old people shrink as they age?

　　Yes and do. 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 3-4 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 bait 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 gravity-and-motion-sensing 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 Dot!

　　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.

【湖北省部分重点中学2017-2017学年上学期高一期中考试 英语试卷含听力 Word版含答案】相关文章：

★ 豫晋冀2015届高三上学期第二次调研考试试卷 英语 Word版含答案

★ 广西玉林市育才中学2017-2017学年高一上学期期中考试英语试题

★ 山西省忻州一中2017-2017学年高一上学期期中考试英语试题 Word版含答案

★ 安徽省蚌埠一中2015届高三上学期期中考试英语试卷 Word版无答案

★ 浙江省温州市十校联合体2016-2017学年高一上学期期中联考英语试卷

★ 河北衡水中学2017-2017学年高一上学期期中考试 英语试题 Word版含答案

★ 重庆市巴蜀中学2015届高三12月月考英语试卷

★ 云南省部分2015届高三12月份统一考试英语试卷

★ 浙江省诸暨中学2017-2017学年高一上学期期中英语试卷 Word版含答案

★ 四川省新津中学2015届高三一诊模拟英语试卷