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
专升本
Have you ever been startled by a loud noise or by someone appearing suddenly behind you on dark night or by a snake in the grass
Have you ever been startled by a loud noise or by someone appearing suddenly behind you on dark night or by a snake in the grass
admin
2011-07-31
53
问题
Have you ever been startled by a loud noise or by someone appearing suddenly behind you on dark night or by a snake in the grass? Do you remember the sudden, tight feeling in your chest, the way your heart started go pound, the way you seemed to breathe more rapidly? Such reactions occurred because you were frightened. Your brain sent a signal to the special gland (腺) in your body caned the adrenal (肾上的) gland. Other parts of your body were involved, too, but the adrenal gland has a very special function.
The adrenal gland is located on top of your kidney. Since you have two kidneys. You also have two adrenal glands. Each adrenal gland is divided into two parts: a cortex (外皮) and a medulla (髓质). The cortex forms the outer shell; the medulla forms the central core. Both the cortex and the medulla secrete (分泌) hormones, but they have different functions.
The cortex produces more than forty different chemical compounds and hormones. All these things are essential to sustain life. The medulla secretes adrenalin (also called epinephrine, the hormone that prepares the body for emergencies.)
When you are suddenly faced with a dangerous or stressful situation, part of your brain instantly sends a signal to the adrenal gland, and all sorts of things begin to your body. The medulla releases an extra amount of adrenalin into the bloodstream. The adrenalin is carried rapidly throughout the body, stimulating other glands and systems.
It is ______ that mainly helps you respond to a dangerous or stressful situation.
选项
A、a signal sent by your brain
B、the special function of the adrenal gland
C、all stimulated parts of your body
D、All of these
答案
B
解析
转载请注明原文地址:https://www.kaotiyun.com/show/njlC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
Whatisthepassagemainlyabout?WhatistheprobleminJapanesemarket?
Itisimportantforeveryone______learnEnglish.
Ournewhouseisvery______fortheofficeasIcangetthereinfiveminutes.
(Withsteadywages),hewouldbeabletofeedhimselfandhelphisfamily.
Tousitseemssonaturaltoputupanumbrellatokeepthewateroffwhenitrains.Butactuallytheumbrellawasnotinvented
Goingtobedearlyandgettingupearly_____agoodhabit.
Television,itisoftensaid,keepsone【36】aboutcurrentevents,allowsonetofollowthe【37】developmentinscienceandpolitics
ShirleyAllenlovedtosingandplaythepiano.Shestudiedmusicincollege.Herdreamwastobecomea【21】orsinger.Everyt
ShirleyAllenlovedtosingandplaythepiano.Shestudiedmusicincollege.Herdreamwastobecomea【21】orsinger.Everyt
随机试题
关于脑膜瘤CT表现的描述,不正确的是
使用分析天平时,取放物体时要托起横梁是为了()。
原始凭证
根据下列材料,按要求作文。要求:(1)题目自拟;(2)文体不限,诗歌除外;(3)结构完整,语句通顺;(4)字数在800~1000之间。古代有一位智勇双全的将军。一次,他率军对敌,但双方兵力悬殊,他的全部人马只及对方十分之一,因此众将士有
具有集中领导、有利于提高管理效率,但信息传递慢、部门之间易产生矛盾等特点的工程项目管理组织机构形式是()制组织机构。
以下中国历史上著名历史事件按发生先后顺序排序,完全正确的是()。
新中国成立后,随着土改基本完成,我国社会主要矛盾是()
求原点到曲面(x—y)2+z2=1的最短距离。
我穿了呢子大衣,感冒了。
A、HeiswaitingtoseeifLisaisserious.B、Hedoesn’ttreatrelationshipseriously.C、HeisinaseriousrelationshipwithLis
最新回复
(
0
)