试题与答案

如图中的曲线,表示人体血液中两种相关物质含量的变化,纵坐标表示物质的含量.请据图

题型:解答题

题目:

如图中的曲线,表示人体血液中两种相关物质含量的变化,纵坐标表示物质的含量.请据图回答:

(1)若曲线a表示血液中氧气的含量,在I段迅速下降是由于______;此时,曲线b代表的气体在血液中迅速增多,会刺激______,使呼吸运动加快.

(2)若曲线a表示血糖的浓度,在I段曲线下降的主要原因是血糖______;对I段曲线的下降起调节作用的是______.

答案:

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参考答案:A

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