首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
Our bodies are wonderfully skillful at maintaining balance. When the temperature jumps, we sweat to cool down. When our blood pr
Our bodies are wonderfully skillful at maintaining balance. When the temperature jumps, we sweat to cool down. When our blood pr
admin
2005-06-26
104
问题
Our bodies are wonderfully skillful at maintaining balance. When the temperature jumps, we sweat to cool down. When our blood pressure falls, our hearts pound to compensate. As it turns out, though, our natural state is not a steady one. Researchers are finding that everything from blood pressure to brain function varies rhythmically with the cycles of sun, moon and seasons. And their insights are yielding new strategies for keeping away such common killers as heart disease and cancer. Only one doctor in 20 has a good knowledge of the growing field of "chronotherapeutics"(历史治疗术), the strategic use of time(chronos)in medicine. But according to a new American Medical Association poll, three out of four are eager to change that. "The field is exploding," says Michael Smolensky, "Doctors used to look at us like ’ What spaceship did you guys get off?’ Now they’re thirsty to know more. "
In medical school, most doctors learn that people with chronic conditions should take their medicine at steady rates. "It’s a terrible way to treat disease," says Dr. Richard Martin. For example, asthmatics(气喘患者)are most likely to suffer during the night. Yet most patients strive to keep a constant level of medicine in their blood day and night, whether by breathing in on an inhaler(吸入器)four times a day or taking a pill each morning and evening. In recent studies, researchers have found that a large mid-afternoon dose of a bronchodilator(支气管扩张剂)can be as safe as several small doses, and better for preventing nighttime attacks.
If the night belongs to asthma, the dawn belongs to high blood pressure and heart disease. Heart attacks are twice as common at 9 a. m. as at 11 p. m. Part of the reason is that our blood pressure falls predictably at night, then peaks as we start to work for the day. "Doctors know that", says Dr. Henry Black of Chicago’s Medical Center, "but until now, we haven’t been able to do anything about it. " Most blood-pressure drugs provide 18 to 20 hours of relief. But because they’re taken in the morning, they’re least effective when most needed. "You take your pill at 7 and it’s working by 9," says Dr. William White of the University of Connecticut Health Center, "but by that time you’ve gone through the worst four hours of the day with no protection. " Bedtime dosing would prevent that lapse, but it would also push blood pressure to dangerously low levels during the night.
According to the passage, how do human bodies maintain balance?
选项
A、They adjust themselves timely in line with their physical conditions.
B、People increase or lower the body temperature by sweating.
C、People’s hearts pound to compensate when the blood pressure goes up.
D、Both B and C.
答案
A
解析
文章第一段中指出“Our bodies are wonderfully skillful at maintaining balance.When the temperature jumps,we sweat to cool down.When our blood pressure falls,our hearts pound to compensate.”可见,我们的身体具有自我调节功能,A项符合文章的意思,自身可以根据身体的状况及时地调整自己。出汗只是降低体温而没说能提高体温,所以B项不对。血压下降时,心脏才会加快跳动以补充血液,所以C项也不对。所以本题的正确答案为A。
转载请注明原文地址:https://kaotiyun.com/show/5Tmi777K
0
在职申硕(同等学力)英语
相关试题推荐
A.下肢放射性疼痛B.小腿外侧感觉障碍,跨趾背伸力弱C.两者均有D.两者均无L4~L5椎间盘突出症的临床表现可有
腰椎间盘突出症出现大小便障碍和鞍区感觉障碍提示
对呼吸功能障碍者的术前准备,不正确的是
A.垂腕B.虎口皮肤感觉障碍C.两者均有D.两者均无桡骨头骨折伤及桡神经可出现
A.垂腕B.虎口皮肤感觉障碍C.两者均有D.两者均无肱骨干骨折伤及桡神经可出现
A.垂腕垂指畸形B.爪形手畸形C.拇指对掌功能障碍D.Allen试验阳性尺动脉和桡动脉损伤表现为
Sometimes,themessagesareconveyedthroughdeliberate,consciousgestures;othertimes,ourbodiestalkwithoutourevenknowi
Thetemperatureinthisareaislowenoughtoallowfallingsnowto______andslowlytransformintoice.
TheSecurityCouncilisthemostpowerfulbodyintheUN.Itisresponsibleformaintaininginternationalpeace,andforrestori
TheSecurityCouncilisthemostpowerfulbodyintheUN.Itisresponsibleformaintaininginternationalpeace,andforrestori
随机试题
关于甲状腺大部切除术的叙述,下列哪项不正确?
完全脱位牙的保存应忌()
贴敷法用于
金葡苗肺炎患儿突然出现呼吸急促,首先应考虑( )。
下列属于第二类医疗器械的是
针对工程问题,可以采取技术措施、组织和管理措施、经济措施及()。
最低资本要求,核心一级资本充足率、一级资本充足率和资本充足率分别为()
在分析CRM于租赁管理中的应用之前,需要首先明确租赁管理所面向的客户对象和()。
王老师在讲解“什么是信息技术”的教学过程中,先是叙述了一遍信息技术的定义,然后讲解了信息技术通常包括的内容(计算机技术、通信技术、微电子技术、传感技术)。在讲解过程中,许多同学对他的讲解很不感兴趣,低着头做其他的事情。试回答下面的问题:为什么王老师不能
Onceitwaspossibletodefinemaleandfemaleroleseasilybythedivisionoflabour.Menworkedoutsidethehomeandearnedth
最新回复
(
0
)