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Download Name: Date: Grade / Section: _____ Neurons Questions Notes 1
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Name: ___________________ Date: _____________________ Neurons Questions 1. What is a neuron? Grade / Section: _____ Notes ● ____________ or ________ cells are the special cells that carry information through your nervous system ● The message a neuron carries is called a _______ ___________ ● A neuron has 3 main parts: STOP AND JOT #1 Why do you think it is helpful for nerve cells to have lots of branches (dendrites, axon tips)? ________________________________________________________ ________________________________________________________ 2. What are the different types of neurons? STOP AND JOT #2 ● There are three main types of neurons: 1. ______________ neurons pick up ____________ from the environment and change it into a nerve impulse 2. ____________________ carry nerve impulses from one nerve to another 3. _____________ neurons send impulses to muscles, causing them to move in response Explain what each neuron does in the picture when the person puts her hand near the flame: Sensory Interneuron Motor - Page 2 3. How does a nerve impulse travel? ● A nerve impulse (message) travels in the form of an ________________ or _____________ signal ● Nerve impulses can travel as fast as ________! ● There is a tiny ________ between each axon tip and the next structure (dendrite of another neuron, muscle cell, sweat gland, etc.). This space is called a ______________. ● Axon tips release _____________ that allow the ___________ (message) to cross the synapse. These chemicals are called ___________________________. ● Many ________ work by helping or blocking neurotransmitters STOP AND JOT #3 Ferries are boats that carry cars and people across a river. If the river represents the synapse… 1. What could the ferry represent? 2. What could the cars / people represent? 3. What could the road leading the ferry represent? SUMMARY The cells in our nervous system are called ____________. They have three main parts - _____________, ______________, and __________. Neurons carry chemical or electrical messages called ___________. In order to get from one neuron to another neuron or cell, an impulse must cross an empty space called a _____________ with the help of chemicals called ___________________________. Page 2