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
外语
Defined biologically, hair is primarily composed of keratin, a protein, which grows out through the skin from follicles deep wit
Defined biologically, hair is primarily composed of keratin, a protein, which grows out through the skin from follicles deep wit
admin
2013-08-19
30
问题
Defined biologically, hair is primarily composed of keratin, a protein, which grows out through the skin from follicles deep within the dermis. This definition holds for all mammals. What sets humans apart is not in the hair, but in the follicle. Under the microscope, an individual human’s hair follicles are anatomically indistinguishable, meaning that a hair follicle on your head is visually identical to one on your upper arm. Physiologically, however, the two follicles behave very differently. The first type, found in all mammals, produces terminal hair, the longer, darker, thicker hair generally found on the scalp, eyebrows, and eyelashes. The second type, particular to humans, produces the fine, unpigmented vellus hair found on most places of the human body, including the face and back. Vellus hair is usually very short and the follicles are not connected to sebaceous glands.
The main purpose of the passage is to
选项
A、introduce the idea that human hair is different from the hair of other mammals.
B、explain how terminal hair follicles change into vellus hair follicles.
C、describe the similarities between two types of human hair follicles.
D、compare the anatomy of human hair follicles with that of other types of hair follicles.
E、demonstrate that human hair growth contradicts the commonly held definition of biology.
答案
A
解析
The best answer is A. The main purpose of this short passage is simply to introduce the idea that human hair is different from the hair of other mammals. Answer choices B, C, and D are too specific and beyond the scope of the passage. Answer choice E is not supported by information in the passage.
转载请注明原文地址:https://jikaoti.com/ti/7EWYFFFM
本试题收录于:
GRE VERBAL题库GRE分类
0
GRE VERBAL
GRE
相关试题推荐
DuringatriptoobservewildanimalsinAfrica,Iencounteredtheleastbraveanimalonearth,thewildebeest(角马).Isatona
DuringatriptoobservewildanimalsinAfrica,Iencounteredtheleastbraveanimalonearth,thewildebeest(角马).Isatona
Thegirlwasnothappyatthenewschoolbecauseshehad______friendsthere.
Walkingthroughthewoodsalonecanbeafrighteningprospectforakid,butnotfor7-year-oldMatthewofPortland,Oregon.He
Walkingthroughthewoodsalonecanbeafrighteningprospectforakid,butnotfor7-year-oldMatthewofPortland,Oregon.He
Asweknow,physics______thescienceofenergy.
Toimprovethe______isregardedasagoodmethodtoincreasethefarmer’sincomeinthesouthpartofthecountry.
Thetechnicalterm"pagination"isaprocessthatleaveseditors,insteadofprinters,assemblethepageimagesthatbecomethe
Eats,ShootsandLeavesisabookonpunctuationbyjournalistLynneTruss,whocouldbedescribedasa(33).Shededicatest
随机试题
不是直流电药物离子导入的用药原则的是
双胍类降血糖药物主要适用于
汇总记账凭证账务处理程序的优点有()。
居民个人可以办理基本存款账户。()
会计报表项目注释中披露的应交税金明细如下:()S公司拥有X有限公司80%表决权资本,故已按规定将X公司纳入合并会计报表范围。S公司与x有限公司发生商品购销业务,在2006年度合并会计报表附注的“本公司与关联方的交易”进行了披露。( )
Ican’tgiveyou______forthetypeofcaryousellbecausethere’snodemandforitinthemarket.
司法工作人员在民事、行政审判活动中故意违背事实和法律作枉法裁判,情节严重的,构成()。
实施新旧信息系统转换,采用(23)方式风险最小。
Themetalcompany______itwouldbuyastakeinHerbertPlatinum,Ltd.
Lookatthenotes.Someinformationismissing.Youwillhearpartofatalkbyaninvestmentconsultantofacompany.F
最新回复
(
0
)