美国科学60秒 SSS 2013-04-17
时间：2018-12-24 作者：英语课 分类：Scientific American(四)月
英语课
People with asthma 1 crog constructive 2 pollenary disease and other breathing disorders 3 need fast relief with airway 4 tighten-up.unfortunately the most comonly used medication has nocious side effect,but scientists recently discoveryed that a bitter of taste can be more effective treatment, and now they know why,the work is published on Plus Biology.
When an asthma attack hit ,the air we shrink and makes breathing difficult ,to keep air flowing ,the suffer must take medication to relax passager's muscle open and backup,but a couple year ago,research discovered airway contain bitter taste acceptors lets ones on the tongue,after exposure to a bitter substance, the acceptors can expand the airway more quickly and more effectively than the commonly used treatment.
Researcher examined airway tissue to learn why the bitterness make the muscles relax,during an asthma attack,calsin flows into the selfof the airway and contribute to muscle constraction.
but bitter substances block the channel that allow the calcement desell ,that is the opposite of bitter bill.
1 asthma
n.气喘病，哮喘病
- I think he's having an asthma attack.我想他现在是哮喘病发作了。
- Its presence in allergic asthma is well known.它在过敏性气喘中的存在是大家很熟悉的。
2 constructive
adj.建设的，建设性的
- We welcome constructive criticism.我们乐意接受有建设性的批评。
- He is beginning to deal with his anger in a constructive way.他开始用建设性的方法处理自己的怒气。