【单选题】【消耗次数：1】
动脉血H+浓度升高主要通过外周化学感受器兴奋呼吸的原因是
①
H+难以通过血脑屏障
②
H+对中枢化学感受器有抑制作用
③
中枢化学感受器对H+不敏感
④
脑脊液对H+浓度的缓冲
⑤
以上都不对
参考答案：
复制
纠错
相关题目
【单选题】
动脉血H+浓度升高主要通过外周化学感受器兴奋呼吸的原因是
①
H+难以通过血脑屏障
②
H+对中枢化学感受器有抑制作用
③
中枢化学感受器对H+不敏感
④
脑脊液对H+浓度的缓冲
⑤
以上都不对
【单选题】
通过兴奋中枢化学感受器增强肺通气的有效刺激是：
①
脑脊液H+浓度升高
②
脑脊液CO2分压升高
③
脑脊液O2分压降低
④
动脉血H+浓度升高
⑤
动脉血O2分压降低
【单选题】
中枢化学感受器最敏感的刺激物是（）
①
血液中的CO<sub>2</sub>；
②
脑脊液中的CO<sub>2</sub>；
③
血液中的H<sup>+</sup>；
④
脑脊液中的H<sup>+</sup>；
⑤
血液中的O<sub>2</sub>
【单选题】
H+对呼吸的刺激主要是通过
①
直接刺激中枢的呼吸神经元
②
刺激中枢的化学感受器
③
刺激颈动脉窦和主动脉弓感受器
④
刺激颈动脉体和主动脉体感受器
⑤
抑制颈动脉体和主动脉体感受器
随机题目
【单选题】
There were two small rooms in the house, _______ served as a bathroom.
①
the smallest of which
②
the smallest of them
③
the smaller of which
④
smallest of that
【单选题】
The young people are _____ of their responsibility toward society.
①
consistent
②
conscious
③
sensitive
④
sensual
【单选题】
Did the medicine make you feel better?No. The more _______, _______ I feel.
①
medicine I take; and the worse
②
medicine I take; the worse
③
I take medicine; the worse
④
I take medicine; worse
【单选题】
I often ______ the cooking for my family, but recently I have been too busy to do it.
①
will do
②
do
③
am doing
④
had done
【单选题】
The plane was about to _________, and yet l left my ticket behind.
①
take on
②
take off
③
take up
④
take in
【单选题】
Global warming threatens the _______ of the whole human race.
①
summit
②
superiority
③
survival
④
status
【单选题】
So little ____ with each other that the neighbors could not settle their difference.
①
agreed did they
②
did they agree
③
they agree
④
they did agree
【单选题】
Putting in a new window will _____ cutting away part of the roof.
①
include
②
involve
③
contain
④
comprise