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Name: ___________________________________________________________ Date: _____________________________ Period: ________ Nervous System Overview WS 1. Indicate which cell type is identified by the following descriptions. A. Neurons B. Neuroglia ____________ 1. Support, insulate, and protect cells ____________ 2. Demonstrate irritability and conductivity, and thus transmit electrical messages from one are of the body to another area ____________ 3. Release neurotransmitters ____________ 4. Includes microglial, oligodendrocytes, astrocytes, and ependymal cells ____________ 5. Can be unipolar, multipolar, or bipolar 2. Match the anatomical terms with the appropriate descriptions of functions. A. Axon B. Axonal terminal ____________ 1. Releases neurotransmitters C. Dendrite D. Myelin Sheath E. Cell body ____________ 2. Conducts electrical currents toward the cell body ____________ 3. Increases the speed of impulse transmission ____________ 4. Location of nucleus ____________ 5. Generally conducts impulses away from the cell body 3. Match each term with the appropriate description. A. Afferent neuron F. Nerve B. Internueron C. Efferent neuron D. Neuroglia Neurotransmitter G. Nodes of Ranvier H. Schwann cells I. Synapse J. Stimuli E. ____________ 1. Specialized cells that myelinate the fibers of neurons found in the PNS ____________ 2. Junction or point of close contact between neurons ____________ 3. Neuron found between sensory and motor neurons ____________ 4. Gaps in the myelin sheath ____________ 5. Neuron that conducts impulses away from the CNS to muscles and glands ____________ 6. Changes, occurring inside or outside the body, that affect nervous system functioning ____________ 7. Neuron that conducts impulses toward the CNS from the body periphery ____________ 8. Chemicals released by neurons that stimulate other neurons, muscles, or glands ____________ 9. Cells that support the nervous system 4. List and explain the 3 major function of the nervous system. 1. ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ 2. ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ 3. ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ 5. Neuron Diagram a. Label the neuron using the following words. Myelin sheath Dendrites Axon terminals Cell body Schwann cell Axon b. Using a GREEN colored pencil, draw arrows to indicate the direction of impulse transmission along the neuron’s membrane.