陕西省宝鸡市陈仓区2018-2019学年七年级下学期期中生物试卷
※题型：单选题※知识点：单选题※试题难度：中等<br>精子和卵细胞的结合场所是在( )<br>A.卵巢 B.输卵管 C.子宫 D.阴道<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/d7ad7fb971c5445fb58df7de47ae9545/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/d01c009610bb4e42a08c83aa414abb36/389C7CE97441B95709893706B9181D1E.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>肺泡适于与血液进行气体交换的特点是( )<br>A.肺泡数量多 B.肺泡外有丰富的毛细血管<br>C.肺泡壁薄 D.以上都是<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2013/cd42648c39ea40cd80ec934c499bc65c/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2013/9ef2e437101448ffa6f863e3ad3d06be/E53FC865F0805E96CCAB8CBE95058121.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>患有哪种疾病的人不适宜吃太油腻的食物( )<br>A.口角炎 B.咽喉炎 C.皮炎 D.肝炎<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/285f91758cb04f81b0fc9f69057746d1/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/e29aefc6108c46238ea392b86d2a3c03/A4F26758B8F266916A9B0AE7387706D5.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>下列各项中都属于消化道的器官是( )<br>A.肝脏、胃、小肠 B.口腔、小肠、肠腺<br>C.食道、胃、大肠 D.唾液腺、口腔、咽<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2013/7b035a2972be4fccb0f54ccadfd73016/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2013/2c1e938de21b44a29c1af7f5da9f0f72/C4025BC1F70117A8FB26A54854E4F83D.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>下列有关胆汁的叙述中,不正确的是( )<br>A.胆汁不含消化酶 B.胆汁与脂肪分解有关<br>C.胆汁储存在胆囊 D.胆汁由胆囊分泌<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/bedd59f7469646d1a222f37f2517aa15/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/6e57d2c8fede4140af542aa78df4bfe6/430E4401B51D61F44C6FE1C81AB56198.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>在中国居民“平衡膳食宝塔”设计的要求摄入量最少的食物是( )<br>A.糖类 B.蛋白质 C.纤维素 D.脂肪<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/ea2321931e574222937ad7d1845150b7/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/5585ac23f343469d9ff09760767f4fe8/68FBF594182D11680230E8D497B3FC6F.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>如图表示淀粉、脂肪和蛋白质在消化道各部位(甲﹣戊)被消化的程度。其中可以表示蛋白质消化过程的曲线是( )<img src="https://picture2.zhihuicn.com/testImage/2/2020/12/25/42C97F152A4A4772A621EC80B64D7671.png"><br>A.a B.b C.c D.a、c<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/e502fe5a31e64da0b33864c1329b5bc7/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/f4e8ce6afe204165a190bdd6dedc50c0/8D61F0F5770C79AC4FBB4FD76890BDEC.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>下列各物质中,可以不用消化,直接被吸收的是( )<br>A.无机盐 B.脂肪 C.淀粉 D.蛋白质<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/a7f4e16fca864e06bc77eae9e2a49bf8/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/d77e9bea48b8491b82faeb58f2f638c8/7F55216E117F0B98FF9CBA1FE1D3482A.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>李爷爷患上了骨质疏松症,体内可能缺乏( )<br>A.铁 B.钙 C.锌 D.碘<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2013/ce96c074a2914a5485ac501a7373e869/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2013/7acec16d20d2418da166a6ba6d104324/D8BDCA66A44A99532CF6D3AB77EC770B.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>下列不属于血浆成分的是( )<br>A.水 B.血浆蛋白<br>C.血红蛋白 D.葡萄糖、氨基酸、无机盐<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2012/0ca1247ad8904fb1bf2bb82f2b84295b/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2012/2cc3d9cfa88e498999121ce7e9c055dd/DDD6F2A2F62366E7F12937E492F3C735.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>胚泡最后植入的位置是( )<br>A.子宫内膜 B.卵巢 C.输卵管 D.阴道<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2013/837e7812fd0f4454a265a6feb6382e98/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2013/60bfecb3c1e7452084dbbd36abac946f/0BB9800381C68B2DD34D6167A7BF8063.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>如图是某同学探究唾液淀粉酶对淀粉消化的实验操作过程,下列各项关于实验结果的描述中,正确的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2015/4/16/E284188EC62DE145BAC96F0E01AFBB59.png"><br>A.①变蓝,②变蓝 B.①变蓝,②不变蓝<br>C.①不变蓝,②变蓝 D.①不变蓝,②不变蓝<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2015/e1548a50531e493d851b6549aaa77588/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2015/7a54e996cbc6412aaa4588c60af19703/998321B826F249180BC9FE644C3E63D9.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>有一同学在小烧杯中倒入10mL植物油,加入一组消化液,并充分振荡,置于37℃的温水中1小时左右,植物油不见了,你认为这一组消化液是( )<br>A.唾液、胆汁、胃液 B.胆汁、肠液、胰液<br>C.胃液、肠液、唾液 D.胰液、肠液、唾液<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2012/541f7bae27564da1aa6df0e38b74a111/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2012/84d3aefdcdab4ecaae75235b1f8ec326/2A8FC31DE7948C2CDC0953BA448B06AB.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>如图为人体血液循环过程中某物质含量的变化情况,如果Ⅰ代表肺泡间的毛细血管,Ⅲ代表组织细胞间的毛细血管,则该物质最可能是( )<img src="https://picture2.zhihuicn.com/testImage/2/2015/11/17/2ED51ACB488A39141B57CCE5A8ED1221.png"><br>A.氧气 B.二氧化碳 C.养料 D.废物<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2015/96101d88e63c48388db9251cdf1f151e/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2015/5f6380a78f4743a5af40768728570f0e/7E3E4DC6B5E829966967C186BD9929E4.png"><br><br>※题型：单选题※知识点：单选题※试题难度：容易<br>若手指划破后感染发炎,血检时往往会发现血液中某种成分增多,这种成分是( )<br>A.红细胞 B.血浆 C.血小板 D.白细胞<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2012/f79e490775b74fa2a4eb560593a7d814/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2012/b0823290bed645ccbdfdd9338819c59e/5FB90CDC2F04BECB4C1C71162DD52BC6.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>观察鱼尾鳍内血流情况如下,箭头表示血流方向。下列箭头处血管表示动脉的是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2020/8/8/7179B3DC526093382279D461C74F7218.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2020/8/8/C81A478EC6E1B63FD18ADE128213D24E.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2020/8/8/725999374E9595DB917793283AD7D3C2.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2020/8/8/9CC1814E772D1132A2BDFD97CF0A38E7.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/a1a28d81668846d8b400cb68f6128fc3/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/00729f2738bf4101a1bed2eb952ac3bc/610A6293D936BE81528BF7398550877D.png"><br><br>※题型：填空题※知识点：填空题※试题难度：较易<br>我们吃的食物中,所含营养物质,有机物包括<br>、<br>、<br>、<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/68b4a44292af474486e2a50c74bcd7bb/44E8404A22016CCBFB7F222E7B946345.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/ac398ea7eb094d28bc75e9fed84a336c/461232EDB7FA97584CDBD5BA36DBD26D.png"><br><br>※题型：填空题※知识点：填空题※试题难度：较易<br>血液由<br>和<br>组成。<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/d2494c1c0e3b46219424d12a48f968d3/1A7BA838B79C00FCEC19F7AAA18394B2.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/defcd09bc3074ca4977fc26c1b2743a0/A1313297145985B4916DE8A446A6F99B.png"><br><br>※题型：填空题※知识点：填空题※试题难度：中等<br>吞咽时<br>盖住喉口,以免食物进入气管。<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/de446275fd4b4f0286aa63b8c425e61a/2417BE4788F447B85BF2C8729B0844DD.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/6f9df9da29e14261aa2d0aaf1694a908/B79ED955479766506E7E810915F7412A.png"><br><br>※题型：填空题※知识点：填空题※试题难度：较易<br>呼吸系统是由<br>和<br>组成。其中鼻、<br>、<br>、<br>、支气管共同组成呼吸道,主要作用是将吸入的空气变得<br>、<br>、<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/f420b91c446a4207a34969849fa323f4/A610BB0678C1EDE8B3F2A0107ACC00CA.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/5b67f5339a6a4e939c8dd8aa216c0c88/13B21D649C6D15985293E5F6CA104FE1.png"><br><br>※题型：填空题※知识点：填空题※试题难度：中等<br>男性最主要的生殖器官是<br>(作用:产生<br>、分泌<br>)。女性最主要的生殖器官是<br>(作用:产生<br>、分泌<br>)。<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/fe82bcfe7ee742c0b3b140b3f6795de8/532B0FA44ECC5B33EA6AAD5D5A18CCF6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/8a51533049e24b178ccab9b37af547f2/48F3619FA5A6B4F91FD2D1A1C354DD3C.png"><br><br>※题型：填空题※知识点：填空题※试题难度：较易<br>肺是气体交换的主要场所,它的基本结构和功能单位是<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/36d4a7b7682e4820ba530ade83f95946/E22FC747D44170C5BB1B4C6A81169275.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/5dc8e9a3116047c4a3bd556a8b7c7446/07E5D1F8F859970C5C24008171BEBBA6.png"><br><br>※题型：填空题※知识点：填空题※试题难度：中等<br>人体内,血流速度最快的血管是<br>;分布最广的血管是<br>;把血液从身体各部分送回到心脏的血管是<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/aa925b964fbf40b8bb7944e9c76d23eb/FB987521391BA6C744851106BB4A5A96.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/f8686de81d9a4a7da8281c5e4d917950/FD8D8E6A6223723A0D2762C597EF82E2.png"><br><br>※题型：填空题※知识点：填空题※试题难度：较易<br>化石就是石化了的<br>、<br>、<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/579b324c5aee4526982d74514786d659/6D8570458F3B92AC126BDD1E93820584.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/768c797d2ae7482198ebbd491f60536b/97DC8BAEA8511F0F3465AA48F93ECCB6.png"><br><br>※题型：填空题※知识点：填空题※试题难度：中等<br>消化系统包括<br>和<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/5687debbe27c4fbe82e74042ee332f68/89F183D748E18BC232D8E86ABCCCD8A6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/6488e090151e45649f06e566e96134c1/6B7E2FA5DBE4404045404D264F61BC60.png"><br><br>※题型：判断题※知识点：判断题※试题难度：中等<br>食物中的水也属于营养物质。<br>_<br>________<br>(判断对错)<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2013/d221728934e04f8287035bbf0a11134d/1571767E7D00EDF0367E5DB18F5CF334.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2013/249e4a354e7e4016985582a17db5b0ec/007713E62DE695E49D8D3F825019283C.png"><br><br>※题型：判断题※知识点：判断题※试题难度：较易<br>试管婴儿就是在试管内生儿育女的。<br>_<br>________<br>(判断对错)<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/707e99e1b61348958d798742ccf04765/1BF6542C45D8F9CAF60E902F8E776A20.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/717a5d0f45274f2695a1c208ea943c37/92E73EC01E2DFD0C126EFE9CF2F4009A.png"><br><br>※题型：判断题※知识点：判断题※试题难度：中等<br>脂肪依靠肝脏产生的胆汁消化。<br>_<br>________<br>(判断对错)<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/50470da6713447798b367ff96776fe22/1BF6542C45D8F9CAF60E902F8E776A20.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/16ac7d18cd5648b5be17235e94afe62c/6A41D627D289D7966D99F5641DD764CF.png"><br><br>※题型：判断题※知识点：判断题※试题难度：容易<br>人体吸气引起胸廓扩大。<br>_<br>________<br>(判断对错)<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/d6841a1108a44aaf844804258c047077/1BF6542C45D8F9CAF60E902F8E776A20.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/3b13ab3d30f04a55ae9051806737cc00/0BCB64782CEC060251D83369338504B7.png"><br><br>※题型：判断题※知识点：判断题※试题难度：容易<br>呼气时肋间肌和膈肌收缩。<br>_<br>________<br>(判断对错)<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/7975881be4e545888d60a5c7584ead1a/1BF6542C45D8F9CAF60E902F8E776A20.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/a5b0e58c382f4a13b043eaeb4b68a7d7/FA7965FBD5F82E6B00662F6CF6EB36F7.png"><br><br>※题型：判断题※知识点：判断题※试题难度：较易<br>红细胞为不规则形状。血小板为两面<br>凹<br>的圆饼状。<br>_<br>________<br>(判断对错)<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2013/d4c547404ae74cb5bc970669f86f321c/1BF6542C45D8F9CAF60E902F8E776A20.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2013/af8d9ee44178463ca92acebbad97a6fc/C0AAC0F4090DD10451D74721BBF1F330.png"><br><br>※题型：判断题※知识点：判断题※试题难度：中等<br>人体吸入的是氧气,呼出的是二氧化碳。<br>_<br>________<br>(判断对错)<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/9715b0648875472f8dbb54c00dfab9dc/1BF6542C45D8F9CAF60E902F8E776A20.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/981643dae55b4036a0e8ec1f183f30f3/4C9837D37F4E04C37F41DB589D0D96A9.png"><br><br>※题型：判断题※知识点：判断题※试题难度：较易<br>显微镜下观察血液,数量最多的是血小板。<br>_<br>________<br>(判断对错)<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/06041b9dd063466580a16a777ac8f9cc/1BF6542C45D8F9CAF60E902F8E776A20.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/6743bdbb5d4c4bde9185207c12311d9c/FB9F2ED48AACAD2F806348314AC17234.png"><br><br>※题型：判断题※知识点：判断题※试题难度：中等<br>人体的血液就是一种组织。<br>_<br>________<br>(判断对错)<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/7f751aae184746bd9f850bd5a1f42454/1571767E7D00EDF0367E5DB18F5CF334.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/38d049f1c649426e8222db1b474d7c7e/AB2FB6B3AD7349A2FA7F08E7D7AA235C.png"><br><br>※题型：判断题※知识点：判断题※试题难度：中等<br>在四肢静脉的内表面通常具有防止血液倒流的静脉瓣。<br>_<br>________<br>(判断对错)<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/eb3e2fa3ee1d42068de1f0aa1690ddde/1571767E7D00EDF0367E5DB18F5CF334.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/d91287213e3d4e5c8b52d4c0b9eb218a/A53D951FAB0DF494F1E641469D57AB57.png"><br><br>※题型：连线题※知识点：连线题※试题难度：较易<br>将对应的内容连线。<br><img src="https://picture2.zhihuicn.com/testImage/2/2020/12/25/575C5C7CE09703C00BF63B4CCD7C95B1.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/8cd6b42c4bd84e2695b5e88d37e36735/0125B0C5D157A35AF6862B2DEAD39675.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/3dd155d996d244d6a17dfc95de7a43c2/D096030BC6DCB2F061AC012D3898016A.png"><br><br>※题型：读图填空题※知识点：读图填空题※试题难度：中等<br>如图是人体消化系统组成示意图,请在<br><br>中填序号,<br>_<br>________<br>上填文字。<br><img src="https://picture2.zhihuicn.com/testImage/2/2020/12/25/AA9D7F0BC12C589E0338A6FD6E207ECF.png"><br>1.人体最大的消化腺是[],人体最重要的消化腺是[]。<br>2.淀粉开始消化的部分是[],蛋白质开始消化的部位是[],脂肪开始消化的部位是[]。<br>3.可以在短时间内容纳大量食物的是[];能蠕动,不能进行消化的是[]。<br>4.淀粉、蛋白质、脂肪在[]内被彻底消化,最终消化产物分是、、和。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/f9adc63389b848d2b63d66902db9f13d/1D8833D8457CF2F617FCD2F198898B86.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/595ad6ddc1974f38be4809bff9c04ecd/B6A37B9C116CEF595E57165AE362F8BC.png"><br><br>※题型：读图填空题※知识点：读图填空题※试题难度：中等<br>如图为某同学用显微镜观察到的人血涂片,<br>请据图<br>回答:<br><img src="https://picture2.zhihuicn.com/testImage/2/2020/12/25/7DCAE5B88D406C9D4E053322B0D18BBB.png"><br>1.数量最多的是[]号,它呈色,因为其含丰富的,成熟的该细胞不具有结构。<br>2.具有细胞核的是[]号。<br>3.血友病患者受伤后血流不止,与图中[]号有关,图中④号是液体物质,是血液中的。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/1e8b54a5617044608a539dc31ef2c836/736C5413159C55AA200E9B6C10577D08.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/007bb39e47424cd491558cdf6fcf601b/BB694C69C5D35576F35C7119CC3BC00D.png"><br><br>※题型：探究题※知识点：探究题※试题难度：中等<br>在探究“馒头在口腔中的变化时”,进行了以下三种处理,请根据此探究过程回答下列问题:<br><tbody><br>试管<br><br>实验材料<br>馒头碎屑<br>馒头碎屑<br>馒头块<br>唾液<br>毫升<br>毫升<br>毫升<br>清水<br>毫升<br>毫升<br>毫升<br>处理方法<br>充分搅拌后,放入温水中<br>充分搅拌后,放入温水中<br>不搅拌,直接放入温水中<br></tbody><br>1.上述实验中,只探究“牙齿的咀嚼、舌的搅拌”的是号试管,水浴加热的温度模拟口腔温度,大约是℃。<br>2.5﹣10分钟后取出三支试管,各滴加两滴碘液,摇匀,发现号试管中的馒头不变蓝;号试管中馒头部分变蓝;号试管中的馒头全变蓝色。消化过程中馒头中的在口腔中被部分消化成了。<br>3.实验结论:馒头变甜与、以及的分泌都有关系。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/988ed209d311442dbfef2b54e9e1f1ac/6454A8E41B4E5683C6AD54F17BB6A2DE.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/1adc862d8fa443fa8a79d27df2c9ab52/8A38E918169DB4D73D4217715C42D114.png"><br><br>
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