天津市蓟州区2018-2019学年七年级下学期期中考试生物试卷
※题型：单选题※知识点：单选题※试题难度：中等<br>人类起源于( )<br>A.亚洲 B.非洲 C.中国 D.日本<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/80801302b7dd4336be91678859c6d5a4/CFD11B39D2C70E3BAFF53A76B86BA12A.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/2f063442aa5b45a0ab090ba30f70bff9/C292AAD538045129752A62F37B6FA9E1.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>在青春期,饮食上应该做到( )<br>A.吃得越多越好 B.多补充蛋白质、糖类<br>C.营养全面、合理 D.可以不吃早餐<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/b2b4b39c34c742bb96922aee95b3b4be/B01B9AD1709CC523F9D63862305777A8.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/2328226ca3084c43a9f2e5dd2bbc63f2/5F2A5997809CAB264ABD103A9F17357D.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>不能为人体生命活动提供能量的是( )<br>A.脂肪 B.维生素和无机盐<br>C.蛋白质 D.糖类<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/fa85e96a91e34b1c9f0a4c3ca80a135f/CFD11B39D2C70E3BAFF53A76B86BA12A.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/05f1f2275a0a4b179342158b19a15896/15FCD800803C4DD56ED35B88959DC03A.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>淀粉初始消化部位是( )<br>A.口腔 B.食道 C.胃 D.小肠E.大肠<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/5bcedb3b14424758a6da5bb34e42b83e/5EB37C218D6D19EB98E791A4205997A8.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/fa0d3ba57796459f9a8e4e650b6bb029/EF98894B071AD8CDA245C4ACB891E54A.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>食物中,不需要消化就能被消化道直接吸收的物质是( )<br>A.米饭中的淀粉 B.蔬菜中的维生素<br>C.豆浆中的蛋白质 D.油条中的脂肪<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/eee953433b344fd89a72cb88017e2f31/CFD11B39D2C70E3BAFF53A76B86BA12A.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/4ab01c9fca7242368ac0e88f03c76429/8FCB5C826F5F705DF518BBDD7CCE1BBE.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>王维同学的饮食习惯不好,常吃肉类食品,不吃蔬菜和水果,结果导致他的牙龈经常出血,原因是该同学的体内缺乏( )<br>A.维生素C B.维生素B C.维生素A D.维生素D<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/295bb7438a48460aa129730b8c742681/5EB37C218D6D19EB98E791A4205997A8.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/cfc73ac2f46a442395da5813a91f68f1/FCCB0969909288B82E80080B3654C481.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>呼吸系统由多个器官组成,其中最主要的器官是( )<br>A.呼吸道 B.支气管 C.气管 D.肺<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2012/c46378efac0f4820aeb785c53dcd7588/B4A95E0049EF7D88C3ABD6FDD51A35AE.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2012/421ff1c9e0444241a75f4ba1d9d92b01/89E17E8C5C575149C0697338AF2D8F04.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>呼吸与胸廓变化的关系是( )<br>A.胸腔容积增大,肺扩张,吸入空气<br>B.吸入空气引起肺扩张,胸腔增大<br>C.呼出气体使胸腔缩小,肺收缩<br>D.膈肌收缩,胸腔缩小,呼出气体<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/2190a90142104c4c9fde89a80cac5667/5EB37C218D6D19EB98E791A4205997A8.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/dadb7e98876649e48d6f62570234ff41/F274A8D430206FD5EE7929009EBB923B.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下面是四位同学的胸围差测量结果,呼吸功能最好的是( )<br>A.5厘米 B.6厘米 C.3厘米 D.9厘米<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/b41c807de9a04b53a950b8cd48fd47ec/B4A95E0049EF7D88C3ABD6FDD51A35AE.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/eb6e75f6fa69490892043e0baca51fbc/7853B467201FBDAC1255BA94459A549F.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>人体要不停地呼出体内的二氧化碳,这些二氧化碳气体的最终来源是( )<br>A.肺泡 B.细胞 C.毛细血管 D.静脉<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/ca21780f1aa949298bde51ee7caab071/CFD11B39D2C70E3BAFF53A76B86BA12A.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/a0324083d8a34c53b43692c552615a89/8F027169724D9DE82907065BCAD68CCC.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>人在剧烈运动后,呼出的气体比吸入的气体中含量增加最多的是( )<br>A.氧气 B.氮气 C.二氧化碳 D.水蒸气<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/6addc75084b4427eb8472db24c51eb9a/B01B9AD1709CC523F9D63862305777A8.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/a8884f0fd53e4bd88c672a60fabd7553/0E70B0DB2CFBADDD4450371B70F40AF3.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>在新鲜的血中加入柠檬酸纳,血液分为三层,下列叙述不正确的是( )<br>A.上层为血浆 B.上层为血清<br>C.下层为红细胞 D.中层为血小板和白细胞<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/98e4c1627c6a4b4aab32d464557d1c8b/CFD11B39D2C70E3BAFF53A76B86BA12A.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/fd35c79d686c410c88504f6c0b839d8d/B91690DBB91A26ACE1C2FCA89C629A9B.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>将血涂片放在低倍显微镜下观察,数量最多的是( )<br>A.血小板 B.红细胞 C.白细胞 D.不能确定<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/3ccb30d205ce4d799c16569a4c4605f3/CFD11B39D2C70E3BAFF53A76B86BA12A.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/817c8b0f37134109889d07a113c8be40/8F9E9B19676A1D8A849AED63068776E0.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>保证人体内血液能按一定方向流动的因素是( )<br>A.房室瓣+动脉瓣 B.动脉瓣+静脉瓣<br>C.房室瓣+静脉瓣 D.房室瓣+动脉瓣+静脉瓣<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/b6242657e46f4f05866e816994c3dec9/B4A95E0049EF7D88C3ABD6FDD51A35AE.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/6fec8628f7e3411893b7eba60443b868/2C3C6D0FDA1586DAAB861EB8B053A86C.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>伤员失血过多,抢救时需要输血。已知伤员血型为AB型,在正常情况下,应该给这个伤员输入的血液为( )<br>A.B型 B.A型 C.AB型 D.O型<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/a333626100a541cbbdcdc8ddd664296c/B01B9AD1709CC523F9D63862305777A8.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/fc0725445bbb41dcabed86158fdfce12/C4039A056155F3D866F0795EE1E582C5.png"><br><br>※题型：填空题※知识点：填空题※试题难度：中等<br>生殖是产生____________细胞和繁殖____________的过程,也是____________的过程,发育是指从____________形成____________并且成长为____________的过程。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/bbb70eb1b16f45a39d43cd047273fe70/663FD39BF09B34729CB740C2E1811CAA.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/5f725f43958f445e9ac476c9b905a7de/E80981090008CE9FF1D785D914A19634.png"><br><br>※题型：填空题※知识点：填空题※试题难度：中等<br>消化是指在<br>____________<br>内将食物分解成为<br>____________<br>的成分的过程;消化后的营养物质经<br>____________<br>进入<br>____________<br>的过程叫做吸收<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/9f110ac7355944afbe6fb7f58ab23b71/30C58300C05E72EA0CE2C26B953CCAE2.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/8614ba8f862f4d50ad2a66cb4c5dbbc1/A19F235AEB030E89D33D3EF76C925D66.png"><br><br>※题型：填空题※知识点：填空题※试题难度：中等<br>如图为人体消化系统模式图,<br>请据图<br>回答下列问题:<br><img1.人体的消化系统由____________和____________组成。<br>2.图中是____________,能分泌____________。<br>3.人体最大的消化腺是____________,它能分泌____________,促进____________被消化。<br>4.消化吸收营养的主要场所是____________,内有____________和____________增加了吸收营养的面积。<br>5.除肠液以外,由____________分泌的消化液中也含有消化糖类、蛋白质和脂肪的酶。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/aa6fc1c72d8e49a8ab94300c386710ff/2CC73C71F119C02EE07AB9EAF8BF8FAD.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/9215b6a1d1d94b7c91ad25eb162f53ee/64DEDCB97A72D1AFFD4321B3054F2E97.png"><br><br>※题型：填空题※知识点：填空题※试题难度：中等<br>下面是人体所需的六种营养物质及它们在人体内的作用,请用直线将它们连起来<br>蛋白质 <br>人体对它的需要量很小,却大多是人体必需从食物摄取的有机物<br>水 <br>人体主要的供能物质<br>无机盐 <br>人体如果缺少这类物质,就可能会患佝偻病,缺铁性贫血等疾病<br>糖类 <br>建造和修复身体的重要原料,也可以为人体提供能量<br>维生素 <br>人体内含量最多的物质<br>脂肪<br>人 体内的<br>备用能淑物质<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/2f038a004ea84a7e9380362826c1c3ce/98D121E1EF80EF4734327E4BC60A2E66.png"><br>解析<br>略<br>
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