时间:2019-01-08 作者:英语课 分类:Scientific American(八)月


英语课

A friend’s four year old daughter recently complained to me about how badly her mosquito bite itched 2. She was about to burst into tears. The fact that an uncomfortable itchy sensation can drive many of us to distraction 3 led many scientists to believe that the nervous system deals with itch 1 much as it does pain. Others spent years looking, unsuccessfully, for neurons that tell us to scratch rather than that we just hurt.


 


Now, according to a study in the August 7th issue of the journal Science, researchers say they’ve finally found specific itch neurons in mice. They located them in the mouse spinal 4 cord by following up on previous research that showed that some mice respond to itchy stimuli 5 more than others.


 


When scientists knocked out the itch neurons, the mice no longer had the urge to scratch in response to known itchy stimulus 6. But they could still sense and avoid pain, showing that itch and pain are processed independently.The researchers hope that these findings could eventually lead to better treatments for chronic 7 itch, by targeting the specific biochemical pathways involved. As for the four-year-old? She forgot about her itchy bug 8 bite as soon as lunch arrived.


 



n.痒,渴望,疥癣;vi.发痒,渴望
  • Shylock has an itch for money.夏洛克渴望发财。
  • He had an itch on his back.他背部发痒。
v.发痒( itch的过去式和过去分词 )
  • Seeing the children playing ping-pong, he itched to have a go. 他看到孩子们打乒乓,不觉技痒。 来自《现代汉英综合大词典》
  • He could hardly sIt'still and itched to have a go. 他再也坐不住了,心里跃跃欲试。 来自《现代汉英综合大词典》
n.精神涣散,精神不集中,消遣,娱乐
  • Total concentration is required with no distractions.要全神贯注,不能有丝毫分神。
  • Their national distraction is going to the disco.他们的全民消遣就是去蹦迪。
adj.针的,尖刺的,尖刺状突起的;adj.脊骨的,脊髓的
  • After three days in Japan,the spinal column becomes extraordinarily flexible.在日本三天,就已经使脊椎骨变得富有弹性了。
  • Your spinal column is made up of 24 movable vertebrae.你的脊柱由24个活动的脊椎骨构成。
n.刺激(物)
  • It is necessary to curtail or alter normally coexisting stimuli.必需消除或改变正常时并存的刺激。
  • My sweat glands also respond to emotional stimuli.我的汗腺对情绪刺激也能产生反应。
n.刺激,刺激物,促进因素,引起兴奋的事物
  • Regard each failure as a stimulus to further efforts.把每次失利看成对进一步努力的激励。
  • Light is a stimulus to growth in plants.光是促进植物生长的一个因素。
adj.(疾病)长期未愈的,慢性的;极坏的
  • Famine differs from chronic malnutrition.饥荒不同于慢性营养不良。
  • Chronic poisoning may lead to death from inanition.慢性中毒也可能由虚弱导致死亡。
n.虫子;故障;窃听器;vt.纠缠;装窃听器
  • There is a bug in the system.系统出了故障。
  • The bird caught a bug on the fly.那鸟在飞行中捉住了一只昆虫。
标签: SSS neuron
学英语单词
abhorring
acquired cleftpalate
advertence
aggrege
approximate true elongation percentage
aural detector
auto cutter
Berilo
bootlegs
bresnahan
capitalised value
chromises
clobedolum
cold atmospheric leaching
conjugata
conservativeness
container freight station to door
contextual protection
contract for carriage
copperas
cost-per-action
Crocethia
cryptanthus zonatus
cylindrical auger
Cymothoidae
deglutition centre
dilute phase roasting
disapprovest
discors
divergence
duking
echo-signal
electric resistance thermometer
endotransglycosylases
flash-over relay
garment container
hawksworth
hierarchical interrupt
hill-and-dale
Horheim
host unreachable
Indochinese, Indo-Chinese
inertially balanced stabilized platform
interchange circuits
kot
kuessel
Le Massegros
letter bundling machine
memory attribute list
micrometeoritic
MO-MLV
moroccoes
Mututu
naphthalic aicd
national grid compang
numbered unit
pain phosphorus
pallidotomies
parental rights and duties
partes subcutanea
payload deployment and retrieval system
petunia
platanthera chloranthas
platypelloid
porfiry
propagules
quenching crack
remi inferior ossis ischii
repair truck
Rhododendron aganniphum
rickson
scandium oxalate
sense of worth
servo surface encoding
set priorities
sidles
specification of quality
state guarantee
stony iron-meteorite
sulfuric acid monohydrate
sweet meat
tar-pot
ternity
transmitter distortion
trust fund bureau
two sample t-test
U Thant
unassailableness
undefined length record
under water concrete
valeriane
ventresca
vernier theodolite
Von Hippel-Lindau disease
way to go
weaponizing
weigelias
weightiest
wrast
yanagisawa
yowlings
zero check