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1疑问刘聪[贵州省仁怀市城北中学(564500)]北师大新世纪版七年级生物学教材中对神经元的基本功能描述为“神经元的基本功能是接受刺激,产生冲动,传导冲动”。学习神经系统的第一节内容就碰到“冲动”这个概念。在教学过程中怎样表述才能保证对“冲动”的解释既有科学性又能让学生容易理解呢?2讨论陶勇[广东省封开县江口中学(526500)]人教版高中生物学教材《稳态与环境》有具体的解释:“兴奋是以电信号的形式沿着神经纤维传导的,这种电信号也叫神经冲动”。七年级的学生对电信号(局部电流)和电流(电流方向、电压、电场)的理解存在一定的困难,可以采用类比等方法帮助学生初步理解
1 questions Liu Cong [Renhuai City, Guizhou Province Chengbei High School (564500]] Beijing Normal University New Century seventh grade biology textbook describes the basic function of neurons as “The basic function of neurons is to stimulate, produce impulses, Conduction impulse ”. Learning the first section of the nervous system ran into the concept of impulse. How to express in the teaching process to ensure that the “impulse” of the interpretation of both scientific and allow students to easily understand it? 2 Discussion Tao Yong [Fengkai County, Guangdong Province Jiangkou High School (526500] PEP teaching high school biology “Steady state and the environment” have a specific explanation: “Excitement is in the form of electrical signals along the nerve fibers, this electrical signal is also called nerve impulses.” Students in the seventh grade have some difficulties in understanding the electrical signals (local current) and current (current direction, voltage and electric field), and can use analogy to help students to understand them