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
51
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] It can be inferred from the passage that before the Bayliss and Starling experiments, most people believed that chemical integration occurred only ______.
选项
A、during sleep
B、in the endocrine glands
C、under control of the nervous system
D、during strenuous exercise
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3298314.html
相关试题推荐
Ourholidayisdoomedtofailurewithoutyou.A、woulddoomB、wouldhavebeendoom
Theexaminerfailedsomecandidates,and15ofthembeingstudentswithoutwork
Inthelastfewyears,the________ofregularfolksgoingunderthecosmeticknif
Hotelsandrestaurantsarean________partofthecity,withoutwhichthetourist
SDMemoryCardsareversatile,high-capacitystoragecardsthatareextremelysm
Ourholidayisdoomedtofailurewithoutyou.A、woulddoomB、wouldhavebeendoom
Allinall,withoutglobalcooperation,anyeffortstohaveterrorismatbaywou
Expertssaidthattheinternetcan’thurtpeoplewithoutbeinginvited,justlik
Amanwithoutaneducation,manyofusbelieve,isanunfortunatevictimofadve
Withoutactionthatsupportswomen’sliberation,thepromisesactasjustamira
随机试题
Mike:Ifyouarenotbusy,wouldyoubyanychancebeinterestedingoingtothe
[originaltext]Everypersonusesitsownspecialwordstodescribethingsan
事由:假设你是王燕,上个星期不小心把向王老师借的一本关于美国文学的书弄丢了,现在写一封信表达自己的歉意。包括以下内容:1.表达自己的歉意,并真诚
It’sclearthatsocialmedialikeTwitterandFacebookarechangingtheway
已知甲公司产品正常销量为100万件,销售60件可实现盈亏平衡,产品单价为10元,
下列关于建筑物之间防火间距计算的说法,不正确的是()。A.变压器与建筑物、储罐
下列关于我国检察制度的说法错误的是:A、检察制度是指国家设立专门机关代表被害人检
主寒证的舌色有A.紫舌 B.绛舌 C.青舌 D.红舌 E.淡白舌
细菌经紫外线照射会发生DNA损伤,为修复这种损伤,细菌合成DNA修复酶的基因表达
共用题干 某工程项目的建设单位通过公开招标方式确定某施工单位为中标人,双方签订
最新回复
(
0
)