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Functional Organization of Nervous Tissue


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The nervous system is made up of the brain, spinal cord, nerves, and sensory receptors. It's responsible for sensory perceptions, mental activities, as well as stimulating muscle movementsand the secretions of many glands. For example, as a hungry person prepares to drink a cup of hot soup, he smells the aroma and anticipates the taste of the soup. Feeling the warmth of the cup in his hands, he carefully raises the cup to his lips and takes a sip. The soup is so hot that he burns his tongue. Quickly, he jerks the cup away from his lips and gasps in pain. None of these sensations, thoughts, emotions, and movements would be possible without the nervous system.

This chapter explains the functions of the nervous system (p. 374), divisions of the nervous system (p. 374), cells of the nervous system (p. 376), organizationof nervous tissue (p. 381), electric signals (p. 381), the synapse (p. 394), and neuronal pathways and circuits (p. 403).











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