首页
登录
职称英语
Cells cannot remain alive outside certain limits of temperature, and much n
Cells cannot remain alive outside certain limits of temperature, and much n
游客
2023-11-15
23
管理
问题
Cells cannot remain alive outside certain limits of temperature, and much narrower limits mark the boundaries of effective functioning. Enzyme systems of mammals and birds are most efficient only within a narrow 【C1】______ around 37℃; a 【C2】______ , of a few degrees from this value seriously impairs their functioning. Even though cells can survive wider 【C3】______ , the integrated actions of bodily systems are impaired. Other animals have a wider tolerance 【C4】______ changes of bodily temperature.
For centuries 【C5】______ has been recognized that mammals and birds differ from other animals in the way they regulate body temperature. Ways of 【C6】______ the difference have become more accurate and meaningful over time, but popular terminology still reflects the old division 【C7】______ " warm blooded" and "cold blood- ed " species; warm blooded included mammals and birds, 【C8】______ all other creatures were considered cold blooded. 【C9】______ more species were studied, it became evident that this classification was 【C10】______ A fence lizard usually has a body temperature only a degree or two below 【C11】______ of humans and so is not cold. 【C12】______ the next distinction was made between animals that maintain a 【C13】______ body temperature and those whose body temperature varies with their environment. But this classification also proved inadequate, 【C14】______ among mammals there are many that vary their body temperatures during hibernation. 【C15】______ many invertebrates that live in the 【C16】______ of the ocean never experience a change in the chill of the deep water, and their body temperatures remain constant. The current distinction is between animals whose body temperature is 【C17】______ chiefly by internal metabolic processes and those whose temperature is regulated by the 【C18】______ . The latter do so mainly by moving to favorable sites or by changing their exposure to 【C19】______ sources of heat. Mammals and birds also regulate their temperature by choosing favorable environments, but primarily they regulate their temperature by making a variety of internal 【C20】______ . [br] 【C20】
选项
A、adjustments
B、compensations
C、regulations
D、arrangements
答案
A
解析
adjustment意为通过调整来适应某一因素,符合句意。
转载请注明原文地址:https://www.tihaiku.com/zcyy/3189759.html
相关试题推荐
Asthetemperaturedroppedabruptly,thecamperswere______alloverwithcold.
Clothingmadeofplasticfibershascertainadvantagesover______madeofnatur
Theweathermanbroadcaststhe______intemperaturetwiceaday.A、diversionB、va
Whattopicdoesthespeakerexplainindetails?[br][originaltext]Certain
Whattopicdoesthespeakerexplainindetails?[br][originaltext]Certain
Somepeopleeither______avoidquestionsofrightandwrongorjustremainneutr
Celebrityworshipisnowintherisingandsomeyoungsterscannotresistjump
Themembershipcardentitledhim______certainprivilegesintheclub.A、onB、in
Clothingmadeofplasticfibershascertainadvantagesover______madeofnatur
AfterwatchingthatmovieabouttheAnti-JapaneseWar,peoplecannothelpbut__
随机试题
中国经济奇迹theChineseeconomicmiracle
AmericanGroupDynamicsToday,inWesternresearc
一条指令包括()。A.操作码和地址码 B.信息和数据 C.时间和信息 D
关于肾功能检测的叙述,下列哪项是正确的A.血尿素正常,提示肾功能正常 B.肾小
关于牙尖交错位,不正确的说法是A.是以牙尖交错为前提 B.是牙尖交错时,下颌骨
1岁婴儿,血钾正常浓度范围为A.2.5~4.5mmol/L B.3.0~4.5
预防接种属于A.非特异性免疫 B.自然主动免疫 C.人工主动免疫 D.人工
某刑事人类学家在对260名杀人犯的外貌进行了考察后,发现他们具有一些共同的生理特
个人贷款可采用多种担保形式,不包括()。A.保证担保 B.信用担保 C.抵
下列关于大数法则,说法错误的是()。A.用来阐述大量随机现象平均结果的稳定性
最新回复
(
0
)