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are located throughout the brain and spinal cord. They are the first line of immune defense in the CNS. Microglia are of utmost importance in brain maintenance. They constantly search around the CNS for any type of plaques, damaged neurons, and infections. Microglia are extremely sensitive forms of effector cells, because they must be alert enough to address possible life-threatening damage. This sensitivity is caused by unique forms of potassium channels. Microglia must always be capable of recognizing any foreign bodies, engulf them, and activate

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