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1物质跨膜运输的方式示意图在讲解完“被动运输和主动运输”之后,笔者在学案中展示图1,让学生以小组为单位找出图中的错误。设计目的图1甲:O_2进入人体红细胞的方式是自由扩散,方向应该由高浓度一侧到低浓度一侧,图中细胞膜两侧的氧浓度画反,学生找出错误的同时巩固了知识。图1乙:学生首先判断出葡萄糖进入人
A schematic diagram of the means of trans-membrane transport of matter After explaining “passive transport and active transport”, the author presents Figure 1 in the student case, allowing the students to find out the mistakes in the diagram by group. The purpose of the design is shown in Figure 1. A: The way in which O_2 enters human red blood cells is free diffusion. The direction should be from the high-concentration side to the low-concentration side. The concentration of oxygen on both sides of the cell membrane in the picture is reversed. Students find out the mistakes while consolidating the knowledge. Figure 1b: Students first judge glucose into people