在生理实验课中,测定反射时是一个很久以来普遍采用的实验,该实验对印证理论知识、开发学生智力有一定的意义。然而,在过去的学生实验中,多采用硫酸作刺激,用秒表计时。由于硫酸浓度不易控制,刺激部位易改变,秒表计时本身的误差等,使实验结果不够理想。为了让这个经典实验更有利于培养学生的科学思维、印证理论知 In physiology experiment class, it is a widely used experiment to measure reflexes for a long time. This experiment has certain significance for confirming theoretical knowledge and developing students’ intelligence. However, in the past student experiments, more use of sulfuric acid as a stimulus, with a stopwatch time. As the sulfuric acid concentration is not easy to control, easy to change the stimulation site, the error of the stopwatch itself, so that the experimental results are not ideal. In order to make this classic experiment is more conducive to cultivating students’ scientific thinking, proof of theory knowledge