2020-2021学年人教版八年级上册生物课堂小测5.2.1 动物的运动
※题型：单选题※知识点：单选题※试题难度：较易<br>生物课堂上王老师指着自己受伤的左臂,幽默诙谐地说是伤了“支点”。王老师所说的“支点”是指( )<br>A.骨 B.骨骼肌 C.关节 D.神经<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/a42fb77bb26848b09bfabf9c45d37e41/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/2d1edde5ac724117b004fde02203c369/412B4C216F03D6965A18CBEE19DD6E3C.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>锻炼上臂肌肉时,伸肘和屈肘动作的上臂肌肉协作情况如图。屈肘时,肱二头肌和肱三头肌的活动状态分别是( )<img src="https://picture2.zhihuicn.com/testImage/2/2020/7/17/03B3DCDA56D06ECD7DC0737DA45E8FFB.png"><br>A.舒张,收缩 B.舒张,舒张 C.收缩,舒张 D.收缩,收缩<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/bf4c9c88c9b84c71b66b8f75684eef41/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/528199c3212143df9279278d8a6316cf/07A4B1D1F1C64C13218A6098F11D1C75.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>人双臂自然下垂时,肱二头肌和肱三头肌所处的状态分别是( )<br>A.收缩、舒张 B.舒张、收缩 C.收缩、收缩 D.舒张、舒张<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/7eac2e44b1114f7e9c24e87f6df53a21/2BB966A0E0D0EF1A330D14E3ADEDA5C5.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/e90902cf550d4921af604485c8f358fc/390AAA67BA0E785A2FB05AF8979E7062.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>划龙舟是端午节的传统活动,完成划桨动作的过程中,肌肉所起的作用是( )<br>A.调节作用 B.润滑作用 C.支点作用 D.动力作用<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/cfdfc3886ad54d7c9e81670a030035b0/D9A7E0722DAB5479A60928D5B8864BC6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/82675a7b95a642339eb933ad0579872d/B7C52B24916239A6ED5334766243DC0C.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列关于人体运动的叙述,正确的是( )<br>A.人体运动系统由骨、骨骼肌和关节组成<br>B.骨骼肌的两端固着在同一块骨上<br>C.伸肘时,肱二头肌收缩,肱三头肌舒张<br>D.只要运动系统完好,人体就能正常运动<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/f0877d2292604bd8836becaf14f01052/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/668e870d73694cfca5f00f2e066525a8/1FCB3931145A330F1D5956B298A9DA82.png"><br><br>
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