Which of the following is TRUE about the nervous system? Select all that apply. All sensory input must be processed by the cerebral cortex before a motor impulse is sent out to effector neurons. Stem cell niches are located in the subventricular and subgranular zones of the adult brain. Convergent neural circuits are formed when a single neuron branches out to contact many target neurons. Neuronal bodies are located primarily in the central nervous system O Microglia are involved in multiple maintenance functions and in the regulation of the blood-brain-barrier

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