问题 多项选择题

下列关于甲状腺激素的作用,正确的是()

A.增加组织的耗氧量、促进产热

B.促进婴幼儿脑发育

C.促进糖原分解和小肠吸收糖

D.引起黏液性水肿

答案

参考答案:A, B, C

解析:

甲状腺激素的作用有:①产热效应:增加绝大多数组织的氧耗量和产热量。②对蛋白质代谢:生理剂量可促进蛋白质合成,分泌过多可加速蛋白质分解,甲亢时肌肉消瘦、乏力。而甲状腺激素分泌不足时,引起黏液性水肿。③对糖代谢:促进小肠黏膜对糖的吸收,增强糖原分解,抑制其合成,加强肾上腺素、胰高血糖素、皮质醇和生长素的升糖作用,可升高血糖;可加强外周组织对糖的利用,也有降低血糖的作用。甲亢时血糖常升高,可出现尿糖。④对脂肪代谢:促进胆固醇的合成,也能加速胆固醇降解,甲亢时血中胆固醇含量低于正常。⑤促生长发育:促进组织分化,生长和发育成熟,对脑和骨的发育尤为重要。⑥提高中枢神经系统及交感神经的兴奋性。⑦可使心律加快,心缩力加强,心输出量增加。⑧增强食欲,影响性功能等。由上述作用可以看出应该选ABC。

单项选择题
阅读理解

阅读理解。

     Your body, which has close relations with the food you eat,

is the most important thing you own, so it needs proper treatment

and proper nourishment (营养). The old saying"An apple a day

keeps the doctor away. "is not as silly as some people think. The

body needs fruits and vegetables because they contain vitamin C.

Many people take extra vitamins in pill form (丸剂) ,  believing

that these will make them healthy. But a good diet is made up of

nourishing food and this gives all the vitamins you need.  The body

doesn't need or use extra vitamins, so why waste money on them?

     In the modern western world, many people are too busy to

bother about eating properly. They throw away the good habits and

throw anything into their stomachs, eating hurriedly and

carelessly. The illnesses caused or made worse by bad, eating

habits are frightening.

1. From the first sentence we know that ____.   

A. the more you eat,the better you will feel

B. your body is made up of the food you eat

C. what you eat has great effect on your health

D. all kinds of food you eat can be made into your nourishment

2. How do you understand the old saying underlined in Paragraph 1? 

A. Doctors are no longer necessary if we eat an apple every day.

B. Eating apples regularly brings lots of benefits to our health.

C. The apple is the best among all kinds of fruits.

D. Eating apple is a good way to cure illnesses.

3. In modern western countries, ____.   

A. people are only too busy to cook meals for themselves

B. people don't want to pay more attention to their eating

C. people throw everything into their stomachs without digestion

D. lots of people's illnesses are caused or made worse by bad eating habits

4. If we want to keep healthy,we should _____ .   

A. eat properly

B. only eat an apple a day

C. take as many vitamin pills as possible

D. throw everything into our stomachs slowly and carefully