首页
登录
职称英语
Defined biologically, hair is primarily composed of keratin, a protein, which gr
Defined biologically, hair is primarily composed of keratin, a protein, which gr
游客
2025-02-21
17
管理
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. [br] 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://tihaiku.com/zcyy/3966738.html
相关试题推荐
A、isprimarilyanalyticinitstendencytoseparatethequalitiesofdifferents
TIRADE:A、sermonB、deviationC、disputeD、reasonableappealE、composeddiscourse
DISCONCERTED:A、composedB、miserlyC、relentlessD、sheepishE、perturbedA
Definedbiologically,hairisprimarilycomposedofkeratin,aprotein,whichgr
Definedbiologically,hairisprimarilycomposedofkeratin,aprotein,whichgr
Althoughtherigorsofballetdancingareprimarily(i)______,thisartisalso
Thepolitician’sspeechtothecrowdwascomposedofnothingbut______,abitter
Unlikethestatic,classicallycomposedportraitsproducedbyhermentorWal
Unlikethestatic,classicallycomposedportraitsproducedbyhermentorWal
CarolinaHospitalnotesthatCuban-AmericanwriterswhowriteprimarilyinE
随机试题
Attheturnofthe20thcentury,DutchphysicianChristiaanEijkmanshowed
Whatisthepassagemainlyabout?[br]AccordingtoMichaelSymonds,onefactor
WhenyoureceiveyourPC,unpackallthecomponents,includingthecomputerand
影响人们的健康服务消费需求因素有哪些()。A.健康因素以外的动机B.感知到的需要
根据个人理财的特点,可以将其会计要素分为资产、负债、()、收入、()。A.所有者
可不停电处理的一般缺陷原则上不超过(____)。1个月$;$3个月$;$半年$;
根据《文物保护法实施条例》的规定,( )由国务院建设行政主管部门会同国务院文物
超市采购了一批猪肉,定价为40元/斤,从第二天起每天都比前一天优惠原价的5%。每
根据所给资料,下列说法正确的是:①从2009年到2012年湖北省棉花总产量虽有升
硝酸酯类药物舒张血管的作用机制是A.阻断β受体 B.直接作用于血管平滑肌 C
最新回复
(
0
)