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
55
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://kaotiyun.com/show/ZNjO777K
本试题收录于:
GRE VERBAL题库GRE分类
0
GRE VERBAL
GRE
相关试题推荐
Whenyou______thisoverwithher,youshouldnotseeheranymore.
DuringatriptoobservewildanimalsinAfrica,Iencounteredtheleastbraveanimalonearth,thewildebeest(角马).Isatona
DuringatriptoobservewildanimalsinAfrica,Iencounteredtheleastbraveanimalonearth,thewildebeest(角马).Isatona
DuringatriptoobservewildanimalsinAfrica,Iencounteredtheleastbraveanimalonearth,thewildebeest(角马).Isatona
Walkingthroughthewoodsalonecanbeafrighteningprospectforakid,butnotfor7-year-oldMatthewofPortland,Oregon.He
Walkingthroughthewoodsalonecanbeafrighteningprospectforakid,butnotfor7-year-oldMatthewofPortland,Oregon.He
AAmericansarenotveryBcreatingCwhenitDcomestobreakfast.
Normallyastudentmustattendanumberofcoursesinordertograduate,andeachcoursewhichheattendsgiveshimagradewhic
Thenationsbiggestretailersreportedstrongsalesduringthelastsixmonths.Duringthisperiodofstrongsales,profitswere
Eats,ShootsandLeavesisabookonpunctuationbyjournalistLynneTruss,whocouldbedescribedasa(33).Shededicatest
随机试题
期权买方只可在合约到期时行使权利的是()
新生儿娩出后首先应
患儿,女,10岁。肺动脉瓣区听到3/6级收缩期杂音,同时听到不受呼吸影响的明显第二心音分裂。该患儿可能是
以下选项不属于绿藻的是()。
存款人申请开立一般存款账户有数量限制。 ( )
阅读下列文字资料,回答以下问题:2003年乡镇企业保持了持续稳定的增长态势。据农业部统计,2003年乡镇企业实现增加值36600亿元,同比增长13%,其中工业增加值25960亿元,同比增长14%,工业在乡镇.企业中的主导地位没有动摇;营业收入14
取款机:银行职员
甲公司欠乙公司30万元,一直无力偿付。现丙公司欠甲公司20万元已到期,但甲公司明示放弃对丙的债权,对甲公司的这一行为,乙公司可以采取的措施有()。
下列说法错误的是__________。
电子数据处理系统(EDP)、管理信息系统(MIS)、决策支持系统(DSS),一般来讲,它们之间的关系应该是()。
最新回复
(
0
)