The Neuron Name:___________________ Date:____________________ Block:___ We have learned about the major divisions of the nervous system and the major structures of the brain. Now, let’s zoom in on the cells that make up the nervous system and focus on how messages travel along them. 1) The nervous system consists of two types of cells: neuroglial cells and neurons. Define each of these: Structure Definition Neuroglial Cells Neurons 2) Sketch one neuron in with a long axon. Drawing of Neuron: Label the dendrite, cell body, axon, axoplasm, axomembrane, myelin sheath, nodes of Ranvier Structure Dendrite Cell Body Axon Function 3) There are three main classes of neurons that we need to know. They are sensory neurons, interneurons, and motor neurons. Distinguish between these with respect to structure and function in the chart below: Sensory Neuron Interneuron Motor Neuron Structure: Dendrite – Cell Body – Axon – Function 4) Sketch a drawing that includes all three types of neurons and their arrangement. Label the dendrite, cell body, and axon, in each type respectively. Use Figure 17.2 as a model.