七年级生物下册4.8.3合理膳食与食品安全练习(新版)北师大版.doc

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1、1合理膳食与食品安全同步练习1、膳食中不搭配蔬菜和水果等食物,会造成身体缺乏( )。A、淀粉和蛋白质 B、维生素和无机盐C、蛋白质和脂肪 D、维生素和脂肪2、有的同学经常因学习、生活紧张而不吃早餐。其实早餐很重要,因为在每日摄入的总能量中,早餐的能量占( )。A、30% B、20% C、40% D、5% 3小肠绒毛所起的主要作用是( )A减缓食物通过小肠的速度 B增加吸收营养物质的表面积C可以摆动促进食物快速通过小肠 D可以起到清扫消化道的作用4. 下列液体中不含消化酶的是( )A胃液 B胆汁 C胰液 D肠液 5. 下列消化液中,对淀粉、蛋白质、脂肪都有消化作用的是( )A. 唾液和胃液 B.

2、 肠液和胰液C. 胆汁和胰液 D. 胃液和肠液6蛋白质在人体消化道内最终消化为( )A氨基酸 B葡萄糖 C甘油 D脂肪酸7. 淀粉、脂肪和蛋白质在人体消化道内被消化液消化的先后顺序正确的是( )A. 淀粉、脂肪、蛋白质 B. 淀粉、蛋白质、脂肪C. 脂肪、淀粉、蛋白质 D. 蛋白质、淀粉、脂肪8. 在人体的消化器官中,胃能吸收的物质是 A葡萄糖 B水 C氨基酸 D蛋白质9. 当体内胆汁分泌不足时,将主要影响以下哪种食物的消化? ( )A. 豆腐 B. 米饭 C. 肥肉 D. 瘦肉10. 人体最大的消化腺是 ( )A胰腺 B肠腺 C肝脏 D胃腺参考答案:1、B 2、A 3、B 4、B 5、B 6、A 7、B 8、B 9、C 10、C2

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