Question 1
在人体呼吸过程中,肺泡内气体交换的动力是什么?
- AATP的消耗
- B气体的分压差
- C肺泡壁的收缩
- D胸膜腔的负压
Answer: B. 气体的分压差
气体交换遵循扩散原理,气体分子由分压高的一侧向分压低的一侧扩散,即取决于气体分压差。
UEC Senior 2 · Biology
高二Biology · 气体交换 (Gas Exchange)
气体交换 (Gas Exchange) is part of the UEC Senior 2 Biology syllabus. Practice the MCQs here to sharpen your exam technique — each question comes with a worked explanation.
Free sample questions
Question 1
Answer: B. 气体的分压差
Question 2
Answer: C. 在肺部氧分压高时,$ ext{Hb}$与$ ext{O}_2$结合形成$ ext{HbO}_2$
Question 3
Answer: D. 肺总量 - 残气量
Question 4
Answer: A. 以碳酸氢根离子($ ext{HCO}_3^-$)的形式
Question 5
Answer: B. 二氧化碳分压升高导致血红蛋白对氧的亲和力降低
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