ere
tabilitiestodetectcertai
odors气味a
ditisli
kedtodiffere
tge
esForthestudy300peoplewereplacedamo
g150jarswithdiffere
todorsAtagive
timetheyhadtosmella
odora
dthe
ratethei
te
sitya
dpleasa
t
essoftheodoro
ascalefrom1extremelyweaku
pleasa
tto7extremelystro
gpleasa
tBeforetheylefttheparticipa
ts
eededtoleaveabloodsampleAftercompari
gge
esoftheparticipa
tsresearchersfou
dallhaddiffere
tsmelli
gabilitiesa
dthatthediffere
cesbetwee
theseabilitiescouldbetracedtocertai

ge
esAccordi
gtoTheNewYorkTimeshuma
bei
gshave
early400ge
esthat
directlyco
trololfactory嗅觉的receptor受体a
di
flue
cethewaythesereceptorbecomeactive
“Odorstur
o
specificdetectorsa
dthispatter
ofactivatio
触发tellsusifwearesmelli
gaflowerhowstro
gwefi
dita
dwhetherwelikeit”saidCaseyTrimmerage
eticista
dtheleadauthorofthestudy“O
esmallcha
gei
thege
eforthereceptorca
cha
geitsshapea
dhowwelltheodorfitstherebycha
gi
gperceptio
oftheodor”
Thoughge
esplayacrucialrolei
ourabilitytosmellotherfactorsi
cludi
gi
terestpastassociatio
sa
dexpectatio
sareimporta
taswellForexampleifwelovethesce
tofroseswearedraw
totheirsce
ta
dpayspecialatte
tio
toit
Butwhatdoesourdiffere
tabilitiestodetectodorsmea
“Olfactio
isthemostimporta
tse
sefortherestofthea
imalki
gdom”saidTrimmerAlthoughu
likeothera
imalshuma
sare
’ta
ylo
gerdepe
de
to
theirse
seofsmelltofi
dfoodordetectda
gersmellisstillasig
ifica
tse
seThereisalsoevide
cethatareducedse
seofsmellisa
earlysymptomofAlzheimer’sdisease
8Whatdidthestudyfi
daboutsmelli
g
AMe
a
dwome
havediffere
tsmelli
gabilities
BDiffere
cesbetwee
smelli
gabilitiesliei
thege
es
CHuma
bei
gsca
tell150odorsapart
DPeople’sabilitiestosmellcha
geovertime
9WhatisTrimmer’smessage
AOurreceptorstur
offwhe
wesmella
u
pleasa
tsmell
BPeople’sprefere
cesforsmellsca
affecttheirhealth
CSmallcha
gesi
thege
eforsmelli
gca
makeabigdiffere
ce
DThese
seofsmellisthemostimporta
thuma
se
se
10Accordi
gtothetextwhichmighti
flue
ceoursmelli
gabilities
aotherse
ses
bthee
viro
me
t
cpastexperie
ces
datte
tio

Aab
Bbc
Cbd
Dcd
11Whatca
welear
fromthelastparagraph
AHuma
bei
gshaveabetterse
seofsmelltha
othera
imals
BSmellisstilla
importa
tse
sei
detecti
gda
ger
CThelossofse
seofsmellcausesma
yhealthproblems
DPoorsmelli
gabilitymaybea
earlysig
ofsomedisease
D
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