Taller 14. Neuronas y Sistema Nervioso (cap 45) 1. Nervous systems consist of neurons and glia. Neurons are arranged in circuits. Sensory neurons convert information from the external or internal environment into electrical signals; interneurons integrate...
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Taller 14. Neuronas y Sistema Nervioso (cap 45) 1. Nervous systems consist of neurons and glia. Neurons are arranged in circuits. Sensory neurons convert information from the external or internal environment into electrical signals; interneurons integrate and process information; and efferent neurons carry commands to target tissues. Glia have a wide variety of supporting roles, including contributing to the blood–brain barrier. a. Comparing nervous systems of anemones, worms, fishes, and humans, what trends seem to reflect increasing complexity? See pp. 945–946 and Figures 45.1 and 45.2 b. Describe the different parts of neurons and their functions. See pp. 946–947 and Figure 45.3 c. What are some types of glia, and what are their functions? See p. 947 2. Neurons have membrane potentials due to ionic concentration differences across their membranes and because leak channels make the membrane differentially permeable to ions. Changes in ion channel permeabilities cause graded changes i
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