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| Highly specialized cells designed for the single purpose of sending and receiving information |
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| Neurons have a high rate of metabolism, but no means of storing nutrients. In the central nervous system glia (glial cells) provide support for the neurons, help store nutrients |
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| provide metabolic support by supplying oxygen and nutrients to the neurons, and by removing waste products. They also provide structural support |
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| Long branching tendrils emanating from the cell body that are heavily laden with receptors |
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| This structure carries the neural impulse resulting in the output of information. |
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| consists of 80% fat, Myelin wrapped around the axons of neurons forms a sheath that provides structural support and insulation from other neuronS |
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| The neuron actively works to maintain it's internal environment, primarily the neuron's electrical charge relative to the extra-cellular environment (fluids outside of the neuron). In other words, the neuron maintains a state of polarization. Structures on the membrane dispel positively charged ions (sodium and potassium) from the cell. And large concentrations of negatively charged protein molecules inside the neuron cause it to have a - 70mV charge relative to the extra-cellular environ |
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