首页
登录
职称英语
[originaltext] Fish live in water, but do they drink it? The answer is yes,
[originaltext] Fish live in water, but do they drink it? The answer is yes,
游客
2023-08-31
101
管理
问题
Fish live in water, but do they drink it? The answer is yes, but how fish drink water depends on where they live. Water gets into a fish’s body through osmosis. Take a cell as an example, if there is more water outside of a cell than inside, water will try to flow into the cell until there is the same concentration of water on either side of the cell’s membrane. The body of a fish acts the same way, (33) either absorbing or losing water depending on its surroundings.
Whether a fish absorbs or loses water is based on the fact that all fish must maintain a certain amount of salt in their bodies to stay healthy. (34) Fish that live in fresh water have a higher concentration of salt in their bodies than the surrounding water. Consequently, water continuously flows into the fish’s body to attempt to dilute the amount of salt in the fish until it is equal to the amount of salt in the surrounding water.
Ocean fish have the opposite problem. Surrounded by salt water, their bodies contain a relatively lower concentration of salt than the ocean water. In this case osmosis causes the fish to constantly lose water in order to equalize salt concentration inside and outside the fish. To partially compensate for the water loss, ocean fish actually drink water through their mouths. And (35) to get rid of the excess salt they take in by drinking seawater, they excrete some salt through cells in their gills.
选项
A、Excreting salt through gill cells.
B、Losing more water to their surroundings.
C、Drinking more water.
D、Diluting the amount of salt.
答案
A
解析
文章最后指出,鱼类是通过腮细胞排出多余盐分的,故选A项。
转载请注明原文地址:https://tihaiku.com/zcyy/2973085.html
相关试题推荐
[originaltext]Anadvertisementsays"LearnEnglishinsixweeks,oryourmo
[originaltext]Anadvertisementsays"LearnEnglishinsixweeks,oryourmo
[originaltext]Theworldisnotonlyhungry;itisalsothirstyforwater.Th
[originaltext]Theworldisnotonlyhungry;itisalsothirstyforwater.Th
[originaltext]W:Goodmorning,sir.CanIhelpyou?M:Goodmorning.Ihavear
[originaltext]W:Goodmorning,sir.CanIhelpyou?M:Goodmorning.Ihavear
[originaltext]M:Hi,Mandy.How’severythinggoing?W:Nottoogood,Isuppose.
[originaltext]M:Hi,Mandy.How’severythinggoing?W:Nottoogood,Isuppose.
[originaltext]W:YouhavetobepresentinclassnextMonday.Theteachercalle
[originaltext]W:YouhavetobepresentinclassnextMonday.Theteachercalle
随机试题
TheAlphaGoprogram’svictoryisanexampleofhowsmartcomputershavebeco
Mostgiftedpeopleareambitiousforitisnaturalforaveryablemantorequir
OnDec.28,a2-year-oldgraywolfcrossedthestatelinefromOregon,beco
()是防止起吊钢丝绳由于角度过大或挂钩不妥时,造成起吊钢丝绳脱钩的安全装置
下列各医疗区的细菌学指标是( ) 空气(cfu/㎡) 物体表面(c
A.五花层B.返砂C.毛笔头D.风选E.毛茸蜜丸储存一定时间后,有糖等结晶析出,
下列药物中,既可安神,又可祛痰的是A.合欢皮B.桔梗C.朱砂D.远志E.白前
下列头孢菌素中对肾脏毒性最小的是A、头孢唑啉 B、头孢噻肟 C、头孢噻啶
干式站用(接地)变绕组绝缘电阻试验数据超标,仍可以长期运行属于(____)缺陷。
发热是指人体体温升高,超过正常范围。发热是人体对致病因子的一种全身性防御反应,是
最新回复
(
0
)