首页
登录
职称英语
Without regular supplies of some hormones our capacity to behave would be se
Without regular supplies of some hormones our capacity to behave would be se
游客
2023-12-23
41
管理
问题
Without regular supplies of some hormones our capacity to behave would be seriously impaired; without others we would soon die. Tiny amounts of some hormones can modify moods and actions, our inclination to eat or drink, our aggressiveness or submissiveness, and our reproductive and parental behavior. And hormones do more than influence adult behavior; early in life they help to determine the development of bodily form and may even determine an individual’s behavioral capacities. Later in life the changing outputs of some endocrine glands and the body’s changing sensitivity to some hormones are essential aspects of the phenomena of aging.
Communication within the body and the consequent integration of behavior were considered the exclusive province of the nervous system up to the beginning of the present century. The emergence of endocrinology as a separate discipline can probably be traced to the experiments of Bayliss and Starling on the hormone secretion. This substance is secreted from cells in the intestinal walls when food enters the stomach; it travels through the bloodstream and stimulates the pancreas to liberate pancreatic juice, which aids in digestion. By showing that special cells secrete chemical agents that are conveyed by the bloodstream and regulate distant target organs or tissues. Bayliss and Starling demonstrated that chemical integration could occur without participation of the nervous system.
The term "hormone" was first used with reference to secretion. Starling derived the term from the Greek hormone, meaning "to excite or set in motion". The term "endocrine" was introduced shortly thereafter. "Endocrine" is used to refer to glands that secrete products into the bloodstream. The term "endocrine" contrasts with "exocrine", which is applied to glands that secrete their products though ducts to the site of action. Examples of exocrine glands are the tear glands, the sweat glands, and the pancreas, which secrete pancreatic juice through a duct into the intestine. Exocrine glands are also called duct glands, while endocrine glands are called ductless glands. [br] What is the author’s main purpose in the passage? ______
选项
A、To explain the specific functions of various hormones.
B、To provide general information about hormones.
C、To explain how the term "hormone" evolved.
D、To report on experiments in endocrinology.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3298312.html
相关试题推荐
Innovationcancomefromwithoutaswellaswithin.Appleiswidelyassumed
Islanguage,likefood,abasichumanneedwithoutwhichachildatacritica
Islanguage,likefood,abasichumanneedwithoutwhichachildatacritica
Islanguage,likefood,abasichumanneedwithoutwhichachildatacritica
Theregularuseoftextmessagesande-mailscanlowertheIQmorethantwic
[originaltext]Whydowecry?Canyouimaginelifewithouttears?Notonlyd
[originaltext]Rhythminliteratureisamoreorlessregularoccurrenceof
[originaltext]Rhythminliteratureisamoreorlessregularoccurrenceof
Withoutregularsuppliesofsomehormonesourcapacitytobehavewouldbese
Withoutregularsuppliesofsomehormonesourcapacitytobehavewouldbese
随机试题
Helivedina_____house,andforthisreasonhewaseasilyacceptedintohismon
[originaltext]M:Let’slookatyourproblem:youalwaysfailthejobinterviews
根据《建筑工程施工质量验收统一标准》(GB50300-2001)第3.0.5条的
在高层建筑管道施工中,安装坡度为1%的供暖管道是()A.热水供暖管道 B.蒸
水泥稳定半刚性基层材料,可以掺加(),且应对混合料进行试验验证。A.缓凝剂 B
2019年江苏省金融信贷规模扩大,保险行业发展较快。全年保费收入3750.2亿元
因违法行为或者违纪行为被解除职务的证券交易所、证券登记结算机构的负责人或者证券公
草豆蔻的功效是A.燥湿行气,温中止呕 B.燥湿,温中,行气 C.健脾止
某药学专业同学毕业实习,其中一项是在医院调剂室轮转,以下是他对于门、急诊和住院调
"帮助病人尽快建立遵医行为"为A.手术后教育目标B.住院常规教育目标C.出院前教
最新回复
(
0
)