上消化道出血呕出的血常呈咖啡样，这是因为（） -题库考试答案搜索网

上消化道出血呕出的血常呈咖啡样，这是因为（）

单选题

2021-12-24 03:06

A、血液与胃内食物混合所致
B、血液与胃内粘液混合所致
C、血液经胃酸作用而形成正铁血红蛋白所致
D、鲜血与唾液混合所致
E、血红蛋白的铁经硫化物作用生成硫化铁

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正确答案

C

试题解析

标签：常见症状与体征呼吸内科基础知识风湿与临床免疫学基础知识

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