文档介绍：托福TPO24阅读真题及答案
托福TPO24阅读真题及答案
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托福TPO24阅读真题及答案
以下，是此次全球托福为正在进行托福备考的考友们整理了托福TPO24阅读真题及答案LakeBreathingDuringSls
also
adecrease
in
the
breathing
rate,
resulting
inlessairbeingexchanged
overall.
This
occurs
becauseduring
NREMsleep
theautomatic,metabolicsystemhasexclusivecontroloverbreathingandthebody
usesless
oxygenandproduces
lesscarbon
dioxide.
Also,
during
sleep
the
automatic
metabolicsystemislessresponsivetocarbondioxidelevelsandoxygenlevelsin
during
,
theremaybeabriefcessationorreduction
ofbreathingwhen
falling
asleep
asthe
sleeper
waxesandwanesbetweensleep
andwakefulness
andtheir
,oncesleepisfullyobtained,
托福TPO24阅读真题及答案
托福TPO24阅读真题及答案
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托福TPO24阅读真题及答案
thereisan
increase
ofcarbondioxide
andadecrease
ofoxygenin
the
blood
that
persists
during
NREM.
,severalchangesin
theair
passageshavebeenobserved.
It
takes
twice
asmucheffort
to
breathe
during
sleepbecauseofgreaterresistancetoairflowintheairwaysandchangesinthe
theupperairwayopenwhenbreathingtendtobecomemorerelaxedduringsleep,
especiallyduringREM(thephaseofsleepinwhichthereisrapideyemovement).
托福TPO24阅读真题及答案
托福TPO24阅读真题及答案
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托福TPO24阅读真题及答案
Withoutthismuscularaction,inhalingislikesuckingairoutofaballoon
—the
resistance
"good"side,
suchascongestion
fromallergies
or
acold,
thenresistance
increases
dramatically.
Coupledwith
these
factors
is
the
loss
ofthe
complex
in