试题与答案

如图表示的是人体肺泡与血液间的气体交换,请据图回答有关问题: (1)肺泡里的交换

题型:解答题

题目:

如图表示的是人体肺泡与血液间的气体交换,请据图回答有关问题:

(1)肺泡里的交换是指血液中的二氧化碳进入肺泡,肺泡内的______进入血液;血液由肺动脉里的______血变成肺静脉里的______血.进入血液中的氧气,通过血液循环最后输送到全身各处的______里,为生命活动所利用.

(2)和吸入的气体相比,人体呼出的气体中,在组成成分上发生了变化,其中______含量增加.

(3)一个人一天要呼吸两万多次,因此空气质量对人体健康很重要.目前,常见的大气污染源一般有以下四种类型:______、______、秸秆焚烧和地面扬尘.选择健康的生活方式,从我做起,例如,不吸烟能避免烟雾中的有毒物质对人体器官,特别是对______的危害.选择步行、骑自行车或乘公交车的方式上学,拒绝家长私车接送,可以有效避免______对空气质量的进一步污染.

答案:

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