2018秋七年级生物下册4.4.1流动的组织—血液学案(无答案)(新版)新人教版.doc

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14.4.1 流动的组织血液一、合作探究探究一:血液的组成及各成分的功能阅读教材 50541页文字资料,思考:1、含有抗凝剂的血液,静置一段时间后,为什么会出现分层的现象?分几层?2、血液的是由哪些成分组成的?3、血浆中的主要成分示什么?具有什么功能?4、红细胞具有什么特点?具有什么功能?5、白细胞具有什么特点?有什么功能?6、血小板具有什么特点?有什么功能?7、血涂片中数量最多的是哪种细胞?二、随堂检测1冬季烤火取暖,尤其要注意预防一氧化碳中毒。一氧化碳中毒的原因是一氧化碳会和血红蛋白结合,从而影响血红蛋白与氧气的结合,使人体出现缺氧、昏迷、甚至死亡。下列有关说法错误的是( )A一氧化碳被吸入肺部的过程中,膈肌处于收缩状态B一氧化碳经肺进入血液是通过气体扩散实现的C若血红蛋白过少,人体会出现贫血症状D进入血液后的一氧化碳会沿血液循环最先到达心脏的右心房2下列关于人体血液的叙述,不正确是( )A血液是人体内流动的组织B血液有运输、防御和保护作用C血液中各成分的含量恒定不变D血液是由血浆和血细胞构成的3长期在平原地区生活的健康人,到西藏高原的最初几天里,血液中数量会明显增多的细胞是( )A红细胞B白细胞C血小板2D淋巴细胞

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