首页
登录
职称英语
How does food affect mood and mind? The answer may he in the chemistry of th
How does food affect mood and mind? The answer may he in the chemistry of th
游客
2023-07-01
68
管理
问题
How does food affect mood and mind? The answer may he in the chemistry of the brain and nervous system. Molecules called neurotransmitters(神经传递素)are chemical messengers. They carry a nerve impulse across the gap between nerve cells. The release of neurotransmitter molecules from one neuron and their attachment to receptor sites on another keep a nerve impulse moving.
Nerve impulses carry messages from the environment to the brain, for example, the pain you feel when you stub(踢碰)your toe. They also carry messages in the other direction, from the brain to the muscles. That’s why you back away from the obstacle that initiated the pain signal and exclaim, "Ouch!"
"Many neurotransmitters are built from the foods we eat," says neuroscientist Eric Chudler of the University of Washington. Too little or too much of a particular nutrient in the diet can affect their production, Chudler says. For example, tryptophan from foods such as yogurt, milk, bananas, and eggs is required for the production of the neurotransmitter serotonin. Phenylalanine from beets, almonds, eggs, meat, and grains goes into making the neurotransmitter dopamine.
Dozens of neurotransmitters are known; hundreds may exist. Their effects depend on their amounts and where they work in the brain. The neurotransmitter serotonin, for example, is thought to produce feelings of calmness, relaxation, and contentment. Drugs that prevent it from being taken again(into the neuron that released it)are prescribed to treat depression. In at least some healthy, nondepressed people, carbohydrate foods seem to enhance serotonin production and produce similar effects. "It is the balance between different neurotransmitters that helps regulate mood," Chudler says.
Proper nutrition may also enhance brainpower. Choline is a substance similar to the B vitamins. It’s found in egg yolks, whole wheat, peanuts, milk, green peas, liver, beans, seafood, and soybeans. The brain uses it to make the neurotransmitter acetylcholine. To test the effects of choline on memory and learning, researchers at the Massachusetts Institute of Technology gave memory tests to college students before increasing the amount of choline in their subjects’ diets. Later, they retested. On the average, memories were better, and the students learned a list of unrelated words more easily. [br] According to the second paragraph, messages sent from the brain to the muscles make you _____.
选项
A、feel the pain
B、stub your toe
C、see an obstacle
D、exclaim "Ouch"
答案
D
解析
第2段第3句开头的That’s why...表明当信息从大脑传到肌肉的时候,会使你躲开障碍物并发出“哎哟”的叫声,D就是这两个动作的其中之一,故为答案。A最具干扰性,因为pain一词在第3句也有提及,但根据本段第一句可知A应属于“信息从肌肉传到大脑”的过程,和题干中的from the brain to the muscles正好相反。因此A并不正确。
转载请注明原文地址:https://tihaiku.com/zcyy/2798843.html
相关试题推荐
Itwasoncethoughtthatairpollutionaffectedonlytheareaimmediatelyar
Itwasoncethoughtthatairpollutionaffectedonlytheareaimmediatelyar
Itwasoncethoughtthatairpollutionaffectedonlytheareaimmediatelyar
Itwasoncethoughtthatairpollutionaffectedonlytheareaimmediatelyar
Thewidespreaduseofsearchenginesandonlinedatabaseshasaffectedthew
Thewidespreaduseofsearchenginesandonlinedatabaseshasaffectedthew
Thewidespreaduseofsearchenginesandonlinedatabaseshasaffectedthew
Thewidespreaduseofsearchenginesandonlinedatabaseshasaffectedthew
Thewidespreaduseofsearchenginesandonlinedatabaseshasaffectedthew
Thewidespreaduseofsearchenginesandonlinedatabaseshasaffectedthew
随机试题
下列不是选择期货交易所所在地时首先应该考虑的是()。A、政治中心城市B、经济、金融中心城市C、沿海港口城市D、人口稠密城市A,C,D期货交易属
Ibelieveverystronglythatouroverproductionofcheapgrainingeneral,a
公路水运工程试验检测人员的继续教育周期为()年;每个周期内接受继续教育的时间累
可以输送具有磨琢性,化学腐蚀性或有毒的散状固体物料,运行费用较低,但输送能力有限
男,48岁。咳嗽、咯血伴右侧胸疼3周就诊,临床和影像学诊断右下叶中央型肺癌。
片剂辅料中的崩解剂是A.乙基纤维素B.羟丙基甲基纤维素C.滑石粉D.羧甲基淀粉钠
工作票一份应保存在工作地点,由()收执;另一份由工作许可人收执,按值移交
社会主义道德建设的基本任务是( )。A.以德治国 B.弘扬中华传统美德 C
一般资料:求助者,男性,61岁,退休干部。 案例介绍:半年前的一天,求助者的老
28岁初产妇,5分钟前经阴道自然分娩一3200g男婴,处理好脐带后准备协助娩出胎
最新回复
(
0
)