问题 解答题

武汉热干面与山西刀削面、两广伊府面、四川担担面、北方炸酱面并称为我国五大名面,是颇具武汉特色的早餐小吃,堪称武汉第一早点.

(1)一碗拌有芝麻酱的热干面,从图甲“平衡膳食宝塔”来看,含有充足的A类和丰富的______类(填字母)物质.

(2)在口腔中充分咀嚼热干面很重要,其主要原因是除了易于吞咽外,还有______的作用.

(3)图乙表示人体的消化系统,热干面被消化的主要场所是______(填数字);______(填数字)是消化系统最大的消化腺,它能分泌胆汁.

答案

(1)“平衡膳食宝塔”是根据平衡膳食的原则转化成各类食物的大致比例,并以直观的宝塔形式表示出来,在:“平衡膳食宝塔”底层的食物需要量多,越往上需要量越少,最顶端需要量最少,由下往上一层为谷物类,主要提供能量;二层为瓜果蔬菜类主要提供维生素;三层为动物性食品、四层为奶制品、豆制品,三四层主要提供蛋白质;五层为油脂类,芝麻酱含有丰富的油脂类即A类,热干面能提高丰富的糖类(淀粉)即图甲“平衡膳食宝塔”中E类谷物类.

(2)在口腔中热干面经过牙齿的咀嚼,舌的搅拌,在唾液中唾液淀粉酶的消化分解作用下,被初步消化分解为麦芽糖.

(3)麦芽糖和没有来得及消化的淀粉进入消化道最长(约5~6米长)的一段⑤小肠中,在肠液、胰液的作用下,最终被分解为葡萄糖.人体最大的消化腺是③肝脏,位于腹腔右上部,它能分泌胆汁.

故答案为:

(1)E;

(2)初步消化淀粉;

(3)⑤;③.

完形填空
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